When a bipolar woman commits suicide, her sister and her sister's fiancé become entangled in an attempt to discover what pushed her to the brink.

A psychiatrist faces his past, present and future when he finds himself involved in the treatment of a young man recently released from prison for a murder committed when the boy was just 11 years old.

A commercial airliner suddenly reappears after being missing for five years. As those aboard reintegrate into society, they experience guiding voices and visions of events yet to occur, and soon a deeper mystery unfolds.