The students of the “Blue Reef” school aren’t used to being bored. This time, the kids decided to shoot their own movie, and the main role went to the boy-shark Thiago! Friends will have to write the script and master acting skills. It’ll be fun! But at the same time, some of their classmates begin to behave very suspiciously. It’s as if they’re hiding something. Thiago is very worried: maybe enemies of their school, led by Lydia Lennox, are plotting something again—and this time they’ve drawn students in? Thiago will have to become not only an actor but also a detective!