If an alien falls to earth and needs to be sent home, or if a restless spirit needs help moving on the other side, the P.E.T. Detectives can help out. To most, they are four ordinary kids, working as P.E.T. Detectives, for a business that helps locate lost lorikeets, mislaid moggies and wayward whippets. But there is another important side to their profession, this is to find and relocate Paranormals, Extra-terrestrials and Time Travellers. Each detective is unique in their talent. Jenny, the eldest of the team, is able to sense an alien presence, a ghost or any person who is lost from their time, while Evan possesses a love of arcane knowledge and weird inventions. Ling's skill is her boundless computer knowledge and Fred has the talent of being able to time travel. The kids operate under the guidance of Mother - the Universal Intelligence Agency that co-ordinates teams of P.E.T. Detectives throughout the Galaxy in the eternal fight to maintain order and defeat the forces of Chaos.