Catboy realizes being the best isn't always the solution when he and the PJ Masks have to prevent Night Ninja from stealing a magical ring hidden atop the Mystery Mountain. Catboy, Gekko and Owlette have to get into the Mystery Mountain to get a magical ring for Night Ninja who captured PJ Robot. As Rip and Howler are tagging the city with paint, Kevin starts to have double thoughts about being a mean one and Gekko wonders if he has what it takes to be good. Join Catboy, Owlette and Gekko on their night time missions, into the night to save the day!
