A zombie survival thriller where the sins of the past manifest in ghastly forms. It follows a cast of characters who navigate the remnants of a bygone era, in the meantime confronting the undead echoes of Soviet experimentation of the Cold War period. 　　The movie’s heroine is Mara, a stern and resolute servicewoman who possesses supernatural powers inherited from her grandmother. She embarks on a harrowing quest to uncover the truth behind her brother’s disappearance, delving into the depths of a secret Soviet bunker and confronting the horrors that lie within.