When Nathan McCann discovers a newborn baby boy half buried in the woods, he assumes he's found a tiny dead body. But then the baby moves and in one remarkable moment, Nathan's life is changed forever.

The baby is sent to grow up with his grandmother, but Nathan can't forget him and is compelled to pay her a visit. He asks for one simple promise - that one day she will introduce the boy to Nathan and tell him, 'This is the man who found you in the woods.'

Years pass and Nathan assumes that the old lady has not kept her promise, until one day an angry, troubled boy arrives on his doorstep with a suitcase . . .