The Lost Daughter Ending Explained [SPOILER!]

SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!

SPOILERS AHEAD

The Lost Daughter Plot Summary and Synopsis

Alone on a seaside vacation, Leda becomes consumed with a young mother and daughter as she watches them on the beach. Unnerved by their compelling relationship, (and their raucous and menacing extended family), Leda is overwhelmed by her own memories of the terror, confusion and intensity of early motherhood. An impulsive act shocks Leda into the strange and ominous world of her own mind, where she is forced to face the unconventional choices she made as a young mother and their consequences.

Source: Wikipedia (CC BY-SA 3.0).