A few months ago, Cath Tolland ran away from her life. Boarding a night bus with no credit cards or identification, using the last of her meager cash to buy a one-way ticket to Florida, Cath left behind her home, her friends, and a seemingly happy marriage--for reasons that not even she can remember.
But now Cath is back home in Connecticut, in the arms of her loving, if distant, husband Derek-and watched over, perhaps a bit too closely, by her critical sister-in-law, Yvonne. Told that her mysterious disappearance was merely another symptom of ongoing mental problems, Cath tries her hardest to piece together her fragmented memories and make sense of her sudden flight.
But why, if she has always suffered from mental problems, can, Cath remember ever speaking with a therapist? Why, if she and Derek have always had a happy marriage, is Cath beginning to remember evidence of "other women"? And-most terrifying-why does Cath feel that she should fear her husband? How much can Cath trust the vague terror that fills her memories now-the terror that may have bought her a seat on a night bus to Florida?