Known to the team as being obsessed with alien life, Eugene Jones wakes up in the middle of a road and discovers that he has been the victim of a fatal hit-and-run incident. As Gwen investigates the suspicious circumstances around his fatality, Eugene recalls events leading up to his death, involving a mysterious alien eye.

Weevils are being kidnapped from the streets of Cardiff, and Torchwood want to know why. Still struggling with the end of his relationship with Diane Holmes, Owen is sent undercover to find out who's behind the kidnappings and soon befriends the charismatic Mark Lynch. Beneath the veneer of city life, Owen discovers a shocking subculture: can he avoid being sucked in?