Erin, a widow, operates a hotel with a baby in her arms. One day, a millionaire named Sam comes for a long-term stay. However, the handsome guest, who's caught Erin's eye, has a secret objective. Erin, knowing nothing of Sam's motives, receives a letter containing an astonishing message—due to a mix-up at the fertility clinic, her baby's father isn't who she thought, and he will soon be fighting for custody! And Erin has no idea that the father is Sam!