A group of young people train to become professional lifeguards. During the course they not only learn and improve their skills but also help people who are in danger. The series shows private and professional lives of future lifeguards but it also incorporates crime plots which makes it captivating and unpredictable. The series was shot in Masuria region – one of the most picturesque regions in Poland, well-known for its lakes and untouched nature. The cast consisting of well-known actors as well as young talents is another advantage of Marina.