Allrighty-then. After his African adventure in "Ace Ventura: When Nature Calls," Ace returned to Florida, married girlfriend Melissa and became the doting father of a baby boy. Never one to sit still, Ace's curious nature took him on another remote case. The goofball gumshoe was never to be seen or heard from again.

Single mom Melissa couldn't fully put the past behind her. Now a zookeeper, she and Ace Jr. (Flitter) have made a life carrying on without her husband. Much to Melissa's chagrin, however, 12-year-old Ace Jr. has begun to follow in his father's comic footsteps. He has recently become a pet detective for the 7th grade set, often trying to recover classmates' missing pets, and always with big mishaps.

But when a master animal thief abducts a baby panda and his mom is wrongly arrested of the crime, Ace Jr. must jump into action. Now, with the help of pals Laura and tech wizard A-Plus, young Ace must bring the thief to justice and do his inane and lovable dad's memory justice.