Graham Greenaway, a 48-year-old financial consultant from Chicago, suddenly finds that he's transported into an alternate world every other day. Stunned and confused, he tries to ground himself by keeping a diary of his experiences in these worlds, each of which challenges him in a different way. As he begins to accept that he can only do so much to change the outcome of things in these alternate worlds, the positive work he's been doing in them incrementally starts to collapse.