Eccentrics, the Sunny Side of the Street: The story of Fabian, who at the end of the 1950s returns from England to Poland. Together with a group of eccentric musicians, he forms a big band, which becomes a huge success after its first performance. The star of the band, and soon Fabian's sweetheart, becomes the seductive and mysterious Modesta. The king and queen of swing set off on a crazy tour of Poland. Their life, although reality does not favor it, begins to resemble, a Hollywood movie. This raises the interest of the relevant services.