When a rare white tiger cub goes missing from the Animal Park, Lexi and Lottie follow a trail of clues to the home of an ex-tiger poacher. But when the evidence proves the poacher is now an animal rights campaigner, the detectives turn their suspicions to a tiger trainer at the local circus. Their suspicions are soon proved false though, and the girls are back to square one… until Lexi has a hunch about Fred’s journalist rival Rosie. After some interrogation, Rosie admits she stole the cub so she’d have an awesome front page story for the school paper. It looks like it’s case closed except, slight problemo… the cub has run away from Rosie’s house! With the help of some animal profiling, our trusty detectives track the cub down to an old lady who thinks it’s a kitten.