Depressed Sebastian Powell and outgoing Nick Hayes are flatmates and best friends. Sebastian is also in love with Nick, but he can't admit it because Nick's amazing and Sebastian's a nobody. He thinks it's going to be this way forever, but one day he and Nick are transported to another dimension.
And not just any other dimension. Seb and Nichole, their alternate selves, are married and seemingly have everything Sebastian wants. It's overwhelming enough to learn that other dimensions exist, but seeing his other self living his best life is enough to make Sebastian think he has it the worst. In addition, his and Nick's ugly pasts have reared their heads.
Sebastian and Nick must learn to navigate this strange new world. But can they do that without losing their identities? And can Sebastian make the choice between Nick's affection and the destruction of all the dimensions before it's too late?