The Specialists are in charge of tracking down a mysterious ruby thief who landed on Peripla, and Riven finds him. a chase ensues between the two, But Orion manages to escape, along with the ruby diamond of the core of Peripla. Meanwhile, the Winx have to face an asteroid monster sent by Valtor. The Specialists eventually manage to capture the ruby thief, who's named Orion, and he appears to be a star scientist determined to save his home planet, Prometia, at all costs. The Winx agree to help him restore Prometia, and decides to travel there with him.