So you and your friends Nigel Uno(Numbuh1), Hoagie Gilligan(Numbuh2), Kuki Sanban(Numbuh3), and Abby Lincoln(Numbuh 5) found out your friend Wally Beetles(Numbuh 4( had gotten a pool but..he can't swim, After getting in the pool Lizzie who is Nigel's girlfriend gets pulled in by her opposite and now you and your friends have to defeat the DNK or the Destructively Nefarious Kids and get the help of the LTDFCF or Little Traitor Dude For Children's Defense