A Ukrainian underwater ballet performance team has to perform at a Korean aquarium only 3 days after getting to Korea. They have to perform the next day but they make many mistakes during the preview performance for the employees. Meanwhile, Greg is a father of 12 children and he takes his kids to a baseball game. Troubles arise as soon as they get on the subway.

A big family of 13 that lives in Pyeongtaek. This family always draws attention when they're out. The 5 performers from Ukraine and Belarus! Will their first underwater performance be successful?

The big American family of 13 takes a trip to Damyang, Jelloanam-do. They already grow tired from the beginning from packing and looking after the kids. Meanwhile, Sveta finishes her performance contract and goes back to Ukraine promising that she'll return to Korea.