A dangerous monster appears in the bathroom at Ernesto and Kevin’s apartment, forcing them to use the half-bathroom. Ernesto becomes trapped in the half-bathroom, and enlists Tanya’s help to defeat the monster and reclaim the full bathroom.

Kevin is rejected by a butterfly and tries to dig a tunnel to hell, but he unearths a talking skull who wants to hang out. Tanya and Ernesto clash with the butterflies, and Kevin fails to invite his friends to laser tag.

Kevin’s dinner party is interrupted by feuding inter-dimensional warriors who seek his secret sauce. Ernesto and Tanya start a pop-up kitchen to sell the sauce to the warriors, fueling their epic battle and delaying Kevin’s dinner party even more.

The friends investigate a bicycle that is taking up the entire bike rack, but discover that it may be a ghost bike, which Kevin says is a thing. Ernesto tries to prove he is a good friend to Tanya, but he’ll have to face his fears first.

Kevin seeks a peaceful lifestyle after befriending a pair of tranquil manatees. Worried that their friend is drifting away, Ernesto and Tanya try to foster a calming environment at the apartment, but Turt has summoned dark forces there.