Suzume married a man who has two sons, and she cherishes their family life together. Today marks the second day of their long-awaited family trip. Early in the morning, her husband and younger son head out for golf, leaving Suzume and the eldest son behind at the vacation home. However, an uneasy tension has gradually begun to stir within the family. Late at night, after everyone has fallen asleep, Suzume discovers that her stepson is troubled, and she takes action to comfort him. But her every move is unexpectedly witnessed by the younger son, who returns early from golf and secretly watches the intimate scene unfold.