Tired of constantly bumping into each other, Maya and Miguel opt to split the apartment in half. They run a piece of tape down the middle, and promise not to cross it under any circumstances. Unfortunately for Maya, the bathroom is on Miguel's side. Unfortunately for Miguel, the umbrellas are on Maya's side, and it's raining. Splitting the apartment turns out to be harder than they thought! When they are forced to work together on a diorama for school, they enlist Tito's help to move supplies back and forth between them, rather than cross the tape. During the project-making, Paco ends up in a bucket of paper machier, and Maya and Miguel finally cross the tape barrier to save him. In the end, they learn from Tito (an only child) what a gift it is to have a sibling.