A dark non-consensual fantasy in which Karin, the kind daughter of a harsh factory owner, treats the workers with compassion only to be repaid with a brutal group assault during a company trip. They attack her in her sleep, violate her in the hot spring with soapy body play and drinking from her crotch, and drive her into leaking orgasms through relentless abuse. The gang rape continues after they return to the factory, where the workers force her to service them again.