Momo believes in ghosts while Okarun believes in aliens; to make each other believe what they deny, they head to a spot famous for UFO sightings and a spiritual hotspot.

Momo brings Ken, who she decides to call Okarun, to her house. However, a massive extraterrestrial appears and suddenly attacks them.

After Momo's grandmother temporarily suppresses the evil spirit within Okarun, she says that a game of tag may be the key to defeating it for good.

Okarun and Momo arrive at the tunnel to confront Turbo Granny. Just when they think they've won, a giant crab spirit crashes through the wall.

Momo and Okarun's ordeal with Turbo Granny has brought them closer, but things remain awkward between them. Okarun realises he still has a problem.

Turbo Granny reveals that Okarun's missing organs are contained within golden spheres. Aira, who has found one, now has the ability to see spirits.