Helena has a problem. She is in love with her twin sister Mia’s boyfriend Kai. When Mia brings Finn, her secret affair, along on their sisters’ holiday, Helena is devastated. If Mia betrays her boyfriend Kai this way, Helena will surely be the last person he could ever fall in love with. In order to not be seen as an accomplice, angry Helena sends a photo of the kissing couple to Kai, who immediately jumps into his car and comes to Italy.

In the midst of all the confusion, Helena meets some scientists who have placed hormone traps all over the woods. Whoever comes into contact with the hormones will immediately fall madly in love with the next person they see. Love dust, so to say? Of course Helena doesn’t let this opportunity to win over Kai’s affections slip by. As a result, everything turns into a big mess and, in the end, everyone falls in love with the wrong person. Chaos takes its course!