Their desire for freedom led a group of Czechoslovakians to join an underground movement. After many years, they remain unable to shake the suspicion that one among them cooperated with the state secret police. Throughout their story drifts the memory of their tragically-departed guru, Marcel Strýko. In an effort to come to terms with the past, an old companion from Prague organizes a revival concert in a Gothic cathedral. Will this help the members reach a truce?