Shaggy detectives take on a new case! Tuzik and Tungus now become watchdogs, they were entrusted with guarding the amusement park. The Ostrich Cat is a little jealous that, unlike his friends, he cannot boast of anything new, except maybe to dream up and lie... But lying is not good, it can come back to haunt you in the future! And then strange things began to happen in the park: unknown hooligans were breaking the rides one after another. But there are no traces of penetration - perhaps these are aliens or insidious butterflies? An exciting investigation awaits the inseparable friends ahead, which will lead to the cave of fear!