A group of young people trains 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 the series captivating and unpredictable. Marina was shot in Masuria region which is one of the most picturesque regions in Poland, well-known for its lakes and untouched nature. Another advantage of the series is the cast consisting of well-known actors as well as young talents.