Memory changes, as the events of history never do. On a strange warm day in January, Stella vanishes without a trace, leaving behind a young daughter and a husband bewildered by her sudden absence. The police officially label her disappearance an accident, a drowning. Stella somehow slipping beneath the thin ice of a nearby river. As her mother Sonia clings to the remnants of her family, she begins to harbour a deepening suspicion that Stella's departure was no accident. With the deceptive draw of an undertow, the chaotic flotsam of misplaced dreams, bruised hopes and buried loves of Sonia's past wells up to overwhelm her. Confronted with her own history of ill-considered choices and failures, Sonia is compelled to revise her preconceptions of her daughter's life and dramatically alter the way she lives her own life.