Grieving businessman Anthony Bothwell's world is shattered when he receives an email from his late wife Maggie—eight months after her death. She warns him that something terrible will happen if he doesn't reply, and as the intimate and urgent messages continue, Anthony suspects those around him.

After confronting his scepticism about life after death and the supernatural, he eventually replies, exchanging messages of tenderness, dark humour, and—when Maggie's secret past is brought to light—healing.

When Anthony meets a fellow widow, Brooke, he begins to look at life differently. Can he set himself free of Maggie for a fresh start with Brooke, or is it too late?