Missy Martin, a superfan who uses a reality-traveling device to bring her fanfiction to life, sending Henry Hart through a series of alternate universes. In these multiverses, characters like Henry and Jasper have different roles, and Missy's fan-created plots, like Henry's sister becoming an evil vampire, are brought to life. The movie follows Henry as he navigates these realities with Missy and his friend Jasper to find a way back to his own world

But in each of the different alternatives, Missy always left you and Henry as a couple. You were a couple in the normal reality too, but seeing different versions of the two of you was a completely different experience