After a scientific experiment goes horribly wrong during a demonstration, a scientist finds himself trapped in an alternative reality that bears some similarities to our own, but also has some striking differences. In this other reality, World War II had never occurred, mankind had not yet travelled into space, and Mt. Everest had not yet been conquered, just to name a few things. Also in this other reality, he is no longer a scientist, but rather a well-known author. He also finds that he is married to a beautiful woman with whom he instantly falls in love, but for whom his alternate self never cared. He has some difficulty convincing anyone that he is not actually who they think he is. With the help of a physics professor who believes his story, he finally manages to convince his wife that he is not the man she knew before. After a personal tragedy in this alternative world, he finds himself back in his own world and desperately trying to locate the woman with whom he fell in love in the other world. Little does she know, however, that her life depends on him finding her.