Max faces some major changes after his owner Katie gets married and now has a child. On a family trip to the countryside, Max meets a farm dog named Rooster, and both attempt to overcome his fears. Meanwhile, Gidget tries to rescue Max's favorite toy from a cat-packed apartment, and Snowball sets on a mission to free a white tiger named Hu from a circus.
Continuing the story of Max and his pet friends, following their secret lives after their owners leave them for work or school each day.
