In a hidden corner of the forest, the mythical little blue beings live in perfect harmony, until a new enemy, an evil inventor, threatens their world with his latest creation: a device that turns any magical creature into an obedient robot. However, one day, while the group prepares to celebrate "Friendship Day," their leader, Papa Smurf, is captured and taken to the city of humans. With their home in danger and only their wit and courage as weapons, a couple of brave Smurfs, Strong Smurf and Clumsy Smurf, decide to embark on a risky adventure to rescue him.