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When her teenage daughter Lucy takes her own life, television host Abigail Walker is given the opportunity to reboot the past, courtesy of mysterious agency Plan B.

Desperately hoping to change the events that led to Lucy taking her own life, Abigail discovers that the underlying reasons are far more complicated than a quick fix will allow.

Abigail attempts to thwart fate by going further back into the past, and an idyllic family trip to Ottawa is derailed when Lucy goes missing.

Locked into a sixty-day trip into the past, Abigail gives herself a holiday from responsibility, but then decides a far more drastic use of Plan B is needed to save Lucy.

Ignoring the advice to not go too far into the past, Abigail desperately grabs a second chance at raising two pre-teens, and re-evaluating her own life choices.

Lucy has survived beyond the designated date of her death, but what she reveals to Abigail completely upends all she thought she knew.