The third crack ran through the obsidian like a vein of lightning frozen in stone. You count the fractures. One, two, three. The mirror sits on the damp flagstones of the watchtower, its surface black and deep, reflecting nothing but the grey sky and your own hollow face. You are Elias, a man of thirty-two years, and the weight of the stone slab is heavier than it has ever been. It is not the weight of the glass, but the weight of the lie you have kept inside it for seven years. Your wife, Elara, died in the winter of your twenty-fifth year, a fever that took her in three days. The mirror, a relic from a time before the town’s current wretchedness, shows truth only when blood is spilled. It shatters if the viewer lies to themselves. You have been bleeding, a slow seep from a cut on your palm, trying to see her face again, but all the glass gives you is the distortion of your own guilt.

The smell hits you before the sound does. It is the smell of rotting fish and wet wool, a stench that clings to the throat and refuses to leave. The harbor below is choked with the stink. You descend the spiral stairs, your boots echoing on the cold stone. The town of Oakhaven is waking, or perhaps dying; it is hard to tell the difference in this light. The cobblestones are slick with a slime that smells of brine and decay. You pass a queue of people waiting for bread, their faces gaunt, their eyes fixed on the ground. They do not look at you. You are the Watchman, the keeper of the peace, but peace is a word that has lost its meaning here.

Captain Vane waits for you at the base of the tower. He is a tall man, his uniform pressed and clean, a stark contrast to the filth of the street. He smells of lavender and iron. "The grain shipment," he says, his voice low and clipped. "It is late, Elias. The merchants are impatient." You know this is a lie. The grain was sold three days ago, to the rival merchants in the south. You have seen the ledgers in his office, the ink still wet on the pages. He is funding his debts with the town’s food, and the plague is the consequence. The sickness spreads in the shadows, a rot that eats the lungs and the will to live. You have ignored it. You have looked away. The mirror in the tower has cracked further, a new fissure branching from the center. You feel the pain in your hand, the blood welling up, a red thread connecting you to the stone.

"You are tired, Elias," Vane says, his eyes narrowing. "Go home. Rest."

"I cannot," you say. "The people need the Watchman."

Vane smiles, a thin, cruel line. "The people need what I give them. That is all."

You leave him standing in the square, his silhouette sharp against the grey sky. You walk to the docks, where the plague is worst. The air here is thick, almost solid. You see a woman lying on the pier, her skin grey, her lips black. She is coughing, a wet, rattling sound. You kneel beside her. She looks at you, her eyes clouded, and asks for water. You have no water. You have only the shard of the mirror in your pocket, jagged and cold. You pull it out. The glass is warm now, humming with a low vibration. You look into it. The reflection is not yours. It is Vane’s, but distorted, twisted, a mask of greed and fear. And then, beneath it, you see yourself. Not the man you are, but the man you have been. The man who looked away. The man who let the grain be sold. The man who bled for his dead wife instead of for the living. The mirror cracks again. A piece of obsidian flakes off and falls into the mud.

You run back to the tower. The wind is rising, whipping the banners of the town council. You climb the stairs, your breath coming in short, sharp gasps. The mirror is waiting. You place the shard against the main piece. It does not fit. The gaps are too wide. You need blood. You need truth. You cut your palm, deeper this time, the pain sharp and clear. You press the wound to the glass. The mirror glows, a faint, sickly light. The reflection changes. It shows the town, not as it is, but as it is in the soul. A mass of rotting, guilty souls, bound together by the stench of their own sins. The plague is not a disease. It is the town’s guilt made flesh.

You hear footsteps on the stairs. Vane is coming. He has found you. He bursts into the tower, his face pale, his hand on his sword. "What have you done?" he shouts.

"I have seen the truth," you say. Your voice is steady, though your hands are shaking.

"You are a witch," he spits. "You use magic to manipulate the people."

"I use the mirror," you say. "It shows what is there."

Vane draws his sword. The steel sings in the cold air. He strikes at the mirror.

The blade hits the glass, and the tower shakes. The mirror does not break. It absorbs the blow.

Vane stumbles back, his eyes wide with fear. He does not understand. He cannot understand.

He is a man of ledgers and debts, of lies and half-truths. He cannot see the truth.

The door to the tower bursts open. The town council stands there, led by Mayor Halloway. They have come to arrest you.

They have heard the rumors. They smell the rot. They see the blood on your hand.

They see the light in the mirror. They freeze.

"Look," you say. You hold up the mirror.

They look. The reflection shows them as they are. Not the dignified men and women of Oakhaven, but the thieves, the liars, the murderers. The mayor sees his own greed. The councilman sees his own cowardice. The merchant sees his own cruelty. They stagger back, their faces contorted in horror. They cannot look away. They cannot look at each other. They can only look at themselves.

Vane screams. He lunges at you, but the crowd stops him. They pull him back. He is dragged out of the tower, his screams echoing in the square. The crowd turns on you. They throw stones. They throw mud. They scream for your blood. You do not move. You hold the mirror. The shards are falling now, one by one, clattering on the stone floor. The light is fading. The truth is too much for them. It is too much for you.

You feel the power of the mirror draining out of you. It is taking your life, your soul, your very essence. You are becoming ash. Your fingers turn to dust. Your skin flakes away. You are dissolving. You do not feel pain. You feel only a strange, cold peace. The mirror shatters completely. The glass falls in a thousand pieces, each one reflecting a different fragment of the town’s guilt. The plague stops. The stench fades. The silence is absolute.

The people stand in the square, staring at their own hands. They see the blood that is not there. They see the rot that is still inside them. They do not mourn you. They are too busy staring at themselves. The town is saved, but it is a hollow place. Everyone knows the truth. No one can look at each other. You are gone. Your sacrifice is the only thing that holds the town together.

In the morning, the sun rises over Oakhaven. The sky is clear, the air is clean. A new watchman arrives at the tower. He is young, his face unburdened by the weight of the past. He holds a small, uncracked mirror in his hand. He looks into it. He sees his own face. He smiles. He does not know what he has inherited. He does not know that the truth is a blade that cuts both ways. He does not know that the mirror is always watching. He steps into the tower, the door closing behind him. The stone is cold. The silence is deep. The mirror waits.