clean slate : undercover cleaner

Orphan Mia can’t pay her Brooklyn rent, so she takes a temp cleaning job at the Major Crimes Unit. On her first day, she sees through Wall Street tycoon Howard’s “hanging suicide” and publicly says he was hoisted after death. Cold supervisor Ethan throws her out; detective Brad then bribes her landlord and has her evicted. Desperate, Mia sneaks into the sealed mansion. Using her acute sensitivity to fibers, force, and cleaning agents, she finds industrial dry-ice residue and 200-pound-test high-tensile fishing line, and deduces a perfect murder mechanism: a dry-ice-delayed trigger and gravity-rigged fake locked room. Ethan, cold on the surface, secretly preserves her evidence. When Brad rushes to close the case, Ethan slams down a frost-covered evidence vial, stuns the room, and takes Mia back to the scene to find the real killer.