Grape and Peanut are playing another game of hide and seek, with Grape counting and Peanut hiding. When she finishes, Grape goes in the living room to find Peanut and comes across a giant fort made of pillows. When Grape asks Peanut what he's done, he replies that since the Sunomata Castle was built overnight, he figured he could build one in a hundred seconds. He invites Grape inside, telling her to enter if she dares.
As Grape makes her way into the fort, she crawls around looking for Peanut. In a hidden spot, Peanut sneakily declares that Grape has fallen into his trap and that the one who is "it" has no power there, only to be caught off guard when Grape immediately discovers him.
Finally together, Grape asks Peanut where he got everything to build the fort. Peanut replies he got it from the closet Grape never goes into: the one with the wool blankets. Since Grape is allergic, she violently sneezes and brings the whole thing down. Peanut says he's gonna tell their mom that she made the mess.