When failed novelist Amos agrees to mind his friend's research station on a remote island for just one day, he expects solitude and a chance to break his writer's block. But when his friend fails to return, Amos discovers he has been deliberately trapped in a bizarre time loop. In a desperate attempt to escape "yesterday", Amos coaxes his ex-wife onto the island, but instead strands them both there. To ensure their own freedom, the two must scheme to invite their most dislikeable friends to the ...