The desire for freedom during the normalization in Czechoslovakia led to the group of individuals who professed a deep inclination towards the the principles of the underground movement. After many years they are unable to face their mutual suspicions of betrayal in the form of cooperation with the state-security police. Throughout their story drifts the memory of their tragically departed guru, philosopher and poet, Marcel Strýko. In an effort to come to terms with the past, an old companion from Prague organises a revival concert in a Gothic cathedral. Will these freethinking members reach a truce?