Stanislaw Lem’s Solaris is a multi-threaded novel that contains complex and ambiguous literary and psychological constructs. One such issue is transgression as a possible consequence of an encounter with aliens. This thesis is an analysis of the process of transgression, its causes and consequences. Isolation is an important issue in Lem’s work, as it is a means to negate earthly laws. The isolated protagonist, when experiencing contact with aliens, does not function within the framework of earthly axiology and logic. The combination of isolation and transgression allows us to identify the relationship between these states and directs attention to the transformation of the protagonists, which touches the essence of their nature.