It is the first day of spring, and as Papa Smurf steps outside to take in a breath of that fresh spring air, he gets a face full of smoke instead. He sees that a nearby Smurf is making smoke clouds in the form ofSmurfette
He then sees another Smurf clipping hedges in the form of Smurfette, a third Smurf painting pictures of Smurfette, and a fourth, Greedy, making cakes in the form of Smurfette
Papa Smurf realizes that his Smurfs have caught "spring fever", when a young Smurf`s fancy turns to thoughts of love, and dismisses it at first as a harmless phenomenon
However, as Smurfette steps out of her to greet her fellow Smurfs, and they all charge toward her house with gifts, running over Papa Smurf in the process, he reconsiders the "harmless" part