A creature born in an abandoned mattress travels around the country feasting on its victims’ vertebrae, struggling to break free from the bed, the mold, and its past.

Green is a professor in a long-term relationship with her lesbian partner. Failing at preparing the deposit for the house and Green being laid off for helping her homosexual colleague, the only option they can choose is to move in with Green’s mother. As their awkward stay prolongs, the mother drives all her energy into her job as a caregiver.

Eunjo, Moonnie, and Geun-young are old friends. To live a more disciplined life, Moonnie hires a hitman to kill her if she fails to follow her schedule. The next day, Moonnie goes missing. Amateur detective Geun-young begins investigating to find her friend, and her suspicions turn towards Eunjo.