A tragic accident, a broken heart, and a marriage drowning in secrets...

Mike always walks the dog in the evening while Elizabeth relaxes in the bathtub—but one night he doesn't come back. Mike has drowned while saving a teenage girl named Kate, his dog standing on the bank barking frantically as the police pull his body from the water.

But despite her husband being lauded as a hero, Elizabeth can't wrap her mind around the fact that Mike is gone—and Kate won't reveal the details of what really happened that night.

Elizabeth finds herself facing the unfathomable possibility that she may not have known her husband at all. Does she really want to know the truth? Or will the weight of Mike's secrets pull her under?