Cat's friend Jade comes to L.A. and Sam became friends with her. Cat invites Sam's old friend (and ex-boyfriend) to L.A. and things turn out so weird. Meanwhile, Dice gets a lot of tuna and it goes weird too.
In order to prove she is clever, Cat plays a trick on Sam using a pair of twins that they are babysitting. Sam turns to her own twin, Melanie, to play a trick on Cat.
On Halloween, Sam and Cat are hired to babysit a doll, with unusual and creepy results. Cat also thinks she may have accidentally turned Dice into a monkey with a magic spell.
Cat invents a holiday, "Yay Day", which is just an excuse to buy presents for everyone. When Cat snoops what other people have gotten her, she discovers an insulting present from Sam.
Cat discovers Sam is really fast at texting and convinces her to compete in a texting competition against a sweet boy, Butler, who has an overbearing mom. Dice tries to avoid an annoying old friend.
Sam opens a safe in her bedroom and discovers a tunnel that leads to a secret room. Cat films herself for 24 hours so that her future self can watch it 10-years from now.
Sam notices that Cat has been spending lots of money. When she asks where it's coming from, Cat takes Sam to a "Magic ATM" that gives her free money. Sam worries that this might not be legal.
When a babysitting client says, "You're my favorite babysitter ever", Sam and Cat debate which one of them he meant. They compete for their new clients' affection to see who really is the best babysitter.
A competing babysitting service is posting fake, bad reviews about Sam and Cat's babysitting service. Sam and Cat confront their new competition and discover they're not what they appear to be.