Joe Cornish writes and directs this British sci-fi comedy action adventure starring Jodie Whittaker, Luke Treadaway and Nick Frost. While being robbed by a gang of thugs outside the South London tower block where she lives, trainee nurse Sam (Whittaker)'s hooded attackers suddenly break off their assault when a meteorite hits a nearby carpark. As Sam flees the scene, the gang members fend off an attack from a small alien being that has emerged from the crash-site, killing it in the process, and carrying off their prize to their rooftop lair. But now, as Sam and the police search for the gang, a new wave of meteorites fall. With the gang emboldened by their latest victory, they prepare to face their new-found enemy, only to be confronted with an army of much larger, savagely vicious alien monsters, hellbent on finding their comrade.

Chris Neilson (Robin Williams) is robbed of his blissful life with his wife Annie (Annabella Sciorra) when he dies in a car crash. His ghost is allowed to keep in touch with Annie by residing in one of her paintings, but both parties remain frustrated by the mortal divide between them. When Annie kills herself, however, she is not allowed to join her husband, as all suicides go to hell. Chris determines to rescue his loved one from eternal damnation, enlisting the help of the Tracker (Max von Sydow) and Albert (Cuba Gooding Jr) to do so.