Complex sentence: Pegg plays Shaun, a man attempting to get some kind of focus in his life as he deals with his girlfriend, his mother and stepfather while attempting to cope with an apocalyptic uprising of zombies.
Split into simpler sentences: Pegg plays Shaun, a man attempting to get some kind of focus in his life as he deals with his girlfriend, his mother and stepfather. At the same time, he has to cope with an apocalyptic uprising of zombies.