At the three-star restaurant "Hikagawa," famous chef Takeshi becomes embroiled in a social media scandal after causing a mass food poisoning incident. Worried about her exhausted son, mother Reiko decides to take him on a hot spring getaway, though she herself is losing the will to live. Amidst this emotional turmoil, Takeshi suddenly feels unexpected sexual desire toward Reiko. As Reiko resolves to offer her body for her son's sake, Takeshi is driven by a desire to cheer her up. Their bond, already closer than typical mother and son, intensifies as they become increasingly consumed by physical longing for one another.