Gabby Duran lands an out-of-this-world job in her new town thanks to her Principal: babysitting an unruly group of important extraterrestrial children who are hiding out on Earth.
Gabby has to choose between keeping her new secret alien-babysitting gig a secret or risking it all by confiding in her extraterrestrial-obsessed best friend, Wesley.
When Gabby hears a rumor about herself going around at school, she uses a telepathic alien to find out who started it, jeopardizing the alien in the process.
When Dina hires Susie Dustman, a self-proclaimed "super-sitter," to watch Olivia, Gabby's jealousy drives her to go toe-to-toe with the rival sitter for her sister's affection.
"Dia DE la Dina" is coming and Gabby is determined to get her mom a gift that makes up for last year's disaster. Meanwhile, Swift prepares for the end of his assignment on Earth.
Gabby's father promised to come to Havensburg for Christmas, but when it seems like he won't be able to get into Havensburg, she creates a plan involving Swift. Jeremy and Wesley set traps to catch the evil "White Beard".