Episode Title:Race up Mystery Mountain - The Mountain Prisoner.Episode Description:Race up Mystery Mountain: At day time, Connor tells his friends about an ancient scroll of Mystery Mountain and says that on top of the mountain is a gold ring that whoever wears it becomes a powerful user of Ninja Villainy until they were shocked that the scroll is missing. At night, Night Ninja and the ninjalinos were the ones who stole the scroll and goes to the Mystery Mountain to get the ring with the PJ Masks and robot in pursuit.
The Mountain Prisoner: The kids are in the museum looking for books about mountain legends until they noticed that the bookshelf is ransacked. At night, Night Ninja and the ninjalinos were reading the books they stole and the PJ Masks goes after them. However, while they're away, the ninjalinos kidnapped PJ Robot and take him back to Mystery Mountain with the PJ Masks in pursuance. When they arrived, Night Ninja tells the PJ Masks to get the ring from the peak Pagoda in exchange for PJ Robot who's being held defendant in their cell which might not be obvious for the heroes due to the Pagoda filled with traps.