A tale of best friends Lila and Elena, which started at the school in the 1950s. As an elderly woman, Elena tries to unravel the mystery of her brilliant friend, who also became her worst enemy.

When Jodie's young son vanished from a lakeside picnic, it was presumed he drowned, but Jodie believed he was abducted. Years later, she sees a boy she's certain is her son. Jeopardizing the life she's painstakingly rebuilt, Jodie begins a dangerous and morally dark journey to prove the boy is her son and save him from his abductor.