Cheesie Mack and his best friend, Georgie, fool their friends into thinking a flying saucer is hovering over their town, but soon, Cheesie and Georgie learn their UFO prank may not have been as fake as they planned.
Seven-year-olds Bradley, Brian, Nate, and Lucy make observations and gather clues that convince them that their older siblings, cousin, and animals have been captured by hungry space aliens.
The Hartford brothers cannot imagine spending Thanksgiving dinner with the Malloy sisters as the practical jokes and rivalries between the two families continue.
When Stevie is grounded for trying to get revenge on her brother, her friends Carole and Lisa come up with a plan to get her off the hook by forcing Chad to confess to his part in all the prank playing.