Eleven-year-old ace detective Laura Marlin is back for her next exciting adventure in the fifth mystery from award-winning author Lauren St John. After helping to capture Mr A, the notorious leader of the Straight A gang, Laura Marlin is looking forward to taking a break from mysteries and relaxing on her school trip to Australia. But then Mr A escapes from prison and suspicious accidents start happening around Laura. Laura is sure that Mr A is out to get revenge on her. But will she be able to convince her friends that the danger is real before one of the accidents becomes deadly?