John and Elizabeth's return jaunt from a visit to China is hijacked by the Suvreni, a race of peace-loving, shapeshifting aliens, who need the Tomorrow People's help to track down a dangerous renegade. However, when Stephen finds the missing alien, he warns Stephen that the Suvreni are not quite as they seem! With Elizabeth simultaneously on the Suvreni spaceship *and* with John in the Lab, appearances can no longer be trusted. Before the Tomorrow People can get to the truth, they'll first need to work out just who's who!