Believing her disturbing impulses are a message from Becky, Sasha hatches a risky plan to get answers. Nancy experiences worrying symptoms.

Sasha's fixation on what happened the night Becky died leads her to several suspects -- and stunning revelations. Elliot opens up about his anguish.

When her growing turmoil pushes away the people she loves, Sasha looks to a stranger for guidance. Ben and Nancy have a devastating heart-to-heart.