Having slipped from the grip of the shady scientist Dr. Knotts and his henchmen, Huck finds his way to St. Petersburg. There, deep in the forest, he takes up residence in his Pap's old hunting shack. Going by Mark, Huck aims to lay low. But then he meets Lucy Thoreau, who captivates him like none before.

To win Lucy's hand, Huck signs up for the Tom Sawyer and Becky Thatcher contest, a signature event for the town featuring a series of competitions which culminates in the naming of a Tom and a Becky at the Tom Sawyer Days festival. The contest hurtles Huck smack dab into modern times. He develops friendships, like one with local boy Randy, who helps Huck navigate life in St. Petersburg, and another with Orion Halley, an eccentric, elderly scientist. But in going for Tom, Huck also quickly learns that he has rivals, parents and contestants alike.

Meantime, Dr. Knotts closes in on his goal of outing Huck's true identity and turning his incredible story into a moneymaking machine. Can Huck maintain his freedom, get named Tom, and win Lucy's heart?