The face of actor Alexander Kaidanovsky remains inextricably linked to the character of Stalker, which gives its title to the film directed by Tarkovsky in 1979. Tsymbal, assistant director on Stalker, tries to reconstruct the personality, dreams and nightmares of Kaidanovsky (who died in 1995), a man marked by the character and condemned to wander as Stalker through the most sinister and disturbing paths of Soviet cinema.