When a 13-year-old is accused of the murder of a classmate, his family, therapist and the detective in charge are all left asking: what really happened?

The tale of three mothers of first graders whose apparently perfect lives unravel to the point of murder.

Set against a sweeping Cornish landscape, two couples discover that their toddlers were switched at birth in a hospital mix-up, and face a horrifying dilemma: do they keep the sons they have raised and loved, or reclaim their biological child?