 The department store salesman Shaun (Simon Pegg) is a real loser, having a routine life that is bothering his girlfriend Liz (Kate Ashfield): every night they go to the pub Winchester with Shaun s best friend, the moron Edward (Nick Frost), and Liz s friends Dianne (Lucy David) and David (Dylan Moran). Shaun and Ed share a house with Pete (Peter Serafinowicz), who hates Ed. When a satellite returning to Earth has some problems over London, the dead return to life and eat human flesh of those alive. Shaun plots a plan to rescue his mother and Liz and bring them to the Winchester, but his sanctuary is surrounded of zombies and things do not happen as planned.