Like any married couple, Allie and Tony have had their fair share of heartache. But when Tony's actions force Allie and her young sons out of their home, things take a desperate turn for the worse. Without her husband around, Allie must cope with two increasingly inquisitive children - as well as the reappearance of her estranged father. So when her eldest son Mark befriends a mysterious next-door neighbour, Jeremy, Allie's glad he's found a distraction. The only trouble is that Mark believes Jeremy is Santa Claus - and that he can put the family back together. While Jeremy becomes increasingly mortified at the mix-up, a little magic never did anyone any harm - did it?