After losing her husband and fleeing with her family under the crushing weight of debt, Ayano Shindo and her son Hiroshi take refuge at the home of her brother-in-law, Mitsuru. Soon, Ayano finds herself overwhelmed by Mitsuru's intense advances. As debt collectors begin showing up at Mitsuru's house, Ayano is pushed further to the edge. Witnessing his mother's suffering, Hiroshi is consumed by uncontrollable anger and sorrow, driving him to make a desperate, impulsive move toward Mitsuru. Isolated in the vast northern wilderness, mother and son stand on the brink of a cliff, facing a new and dangerous crisis.