While hanging his "beast of a masterpiece" painting, Ray discovers a system of tunnels beneath all of Swellview. Charlotte, interrupting Henry and Jasper's game of laser tag with Jake, summons the boys to the Man Cave, where the group soon journeys through to Nacho Ball. Finding mole people living below, Ray claims the centuries-old tunnels for himself. The Mole Queen strikes a deal for the Man group to use their tunnels, but Ray is more intent upon striking back at the mole man who once destroyed one of his Man Caves. As a result, mole people invade the Hart house. To restore peace, Henry must agree to fight blindfolded against the mole champion.
—statmanjeff