Alma runs a red light and wakes up in the hospital recovering from her collision with a lamp post after seeing her dead father in a vision. He re-appears with a confusing and compelling plan.
Alma and Sam get into an argument about lying within a relationship while Alma bounces between different timelines in her life, in Sam's life, and in her father's life.
Alma returns to the Halloween night that her father died and she tries to change the past but fails. In the present, both her mother and boyfriend try to convince her that she needs help for her mental issues.
Alma takes herself and Jacob back in time to the night of the lab break-in which is revealed to have been done by Camila after she learned that Jacob was experimenting on Alma. Farnaz then planned to reveal the truth to Camila and the head of their department which would've ruined Jacob's life. After a failed attempt by Jacob to get Alma to change her own past, she finally learns that Jacob had not been murdered but had purposefully driven himself and Farnaz off a cliff. Jacob decides to possess his past-self in an effort to change the past and promises to meet Alma at a pyramid in Mexico when the timelines realign. In the present, Sam and Camila attempt to convince Alma that she is schizophrenic as was her father. Alma breaks up with Sam, travels to Mexico, and spends the night at the pyramid waiting for Jacob. She is joined by Becca whose marriage to Reed has fallen apart. By morning, Jacob has failed to appear, causing Alma to doubt herself. After Becca leaves and the sun rises over the pyramid, Alma is shocked by something she sees.
