Clara bought the yellow bottle from the hardware store, its cap sealed with a childproof lock and a skull-and-crossbones warning. That night, she read the instructions three times. She put on Tom’s old gloves, too large for her hands, and his goggles, which fogged immediately. She poured half the bottle down the kitchen drain—a thick, syrupy liquid that smelled of nothing but anticipation.

Her foot plunged through up to her ankle. She yanked it back, skinning her shin. The hole she’d made wept a thin, milky fluid that sizzled against the remaining linoleum. She looked down into the darkness and saw her basement ceiling glistening, wet and necrotic, like the inside of a gangrenous wound.

Then came the clog.

The plumber arrived at 7:00 AM, not because she called him, but because the neighbor two doors down reported a strange, chemical odor emanating from her basement window well. His name was Del, a man who had seen everything: tree roots through terra cotta, condoms and gold rings, the occasional rat skeleton. But when he descended her basement stairs, he stopped.

At first, nothing happened. Then the drain burped. A thin wisp of steam curled up from the sink, carrying a chemical bite that made her nose hairs curl. The sound that followed was not the gurgle of relief she expected. It was a low, deep crack , like ice breaking on a frozen lake, followed by a wet, tearing noise.