When Ted and Kat watched their cousin Salim get on board the London Eye, he turned and waved before getting on. But after half an hour it landed and everyone trooped off - but no Salim. Where could he have gone? Haws he spontaneously combusted? (Ted's theory.) Has he been kidnapped? (Aunt Gloria's theory.) Is he even still alive? (The family's unspoken fear.) Even the police are baffled. Ted and Kat follow a trail of clues across London in a desperate bid to find their cousin, while time ticks dangerously by …