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.

Tanya and Kevin romanticize the ancient world. Ernesto takes them to a museum to show them how terrible old times were, but instead they find an eccentric museum curator and a series of coincidences linking them to the past.