Avery Jennings and Tyler James are step-siblings who are complete opposites. The family faces an even bigger adjustment when their new dog, Stan, can talk and also has a blog, unbeknownst to the family. Stan uses his blog to discuss the happenings in the Jennings-James household. Avery and Tyler later learn of Stan's talking ability and agree to keep it a secret from their parents.
Ellen and Bennett find out that Stan can talk, and shortly after the entire James-Jennings family is taken hostage by the U.S. Space Command's Alien Division. Together, the Jennings-James family must work together and devise an escape plan, all while protecting Stan.