Stockholm 1940. In the Gröna Lund amusement park, the Lindgren and Nilsson rides are competing against each other for customers. No blow is too low in this struggle, and the families have been enemies for a very long time. One night, the young John Lindgren sneaks into the Nilsson’s office to ferret out any potential plans. He’s discovered there by Ninni Nilsson, the daughter recently returned from abroad. The two of them don’t notice it, but their bodies don’t hesitate for a second; the two are meant for each other … Against the backdrop of the historic amusement park, the Swedish blockbuster directors Mårlind & Stein unfurl a kaleidoscopic panorama. In their “Romeo and Juliet” story, they pull out every stop for this cinematic spectacle – fast pacing, rousing songs, extraordinary special effects – without losing sight of the serious conflicts of the era.