Charles is a successful engineer living at the turn of the last century. When he tinkers with an antique clock that he intends to give to his fiancée as a Christmas present, he goes numb and when he regains consciousness, it is a hundred years later and his home has been turned into a museum/event house that re-enacts his mysterious disappearance a hundred years ago. Megan works there, having written a thesis about him.
A fun twist to an OK romantic film. One can disregard the fact that Charles does not react more strongly to how development has gone over a hundred years.