Felix (13) spends the summer break with his best friends Sammy (13) and Noor (12) at their secret hangout, a hidden swimming pond in the woods. Their quiet holiday is over when Felix makes an amazing discovery: his vintage walkman picks up sounds from the year 1989. The three friends are fascinated by the weird, funny fragments from this long-gone era. Until they hear something disturbing. In 1989..

With his vintage walkman, Felix can listen to the past. Together with his best friends, he sets out to find answers about the mysterious death of his mother and discovers an environmental scandal. Chemical waste dumped illegally in the '80s threatens their town. How is all of this connected? Can Felix prevent an absolute disaster before it's too late? Felix (13) spends the summer break wi..