After a nasty fall, Jo develops amnesia and forgets the events of the past year. She returns home with her seemingly loving husband Rob but a missing phone and a series of lies reveal that not everything is as it seems.
Plagued by nightmares, Jo visits a support group which doesn't go well. Her son comes to visit and a conflict Jo had forgotten is revealed. Meanwhile, Jo begins seeing a mysterious woman all over town.
Jo remembers that she was not alone the night she was injured. She also starts suspecting she was having an affair and wonders if Rob knew. Childhood memories begin re-emerging as she grows more suspicious of Rob.