Family bonds unravel, twisting into forbidden love. Six family members—parents and children—gather under the pretense of a hot spring trip, but driven by sexual desire, they begin to cross boundaries. Unsettling pairings emerge: stepfather and eldest daughter, stepmother and son. Against the backdrop of their personal struggles, these relationships intensify into passionate affairs that erase all sense of morality. Breaking free from the constraints of family, this is a fierce tale of indulgence in taboo lust.