Moscow, January 2006. On the day after New Year's, following the events of the first film Nochnoy dozor/Night Watch, Night Watch agent Anton Gorodetsky, played by Konstantin Khabenskiy, and his trainee Svetlana 'Sveta' Nazarova, portrayed by Mariya Poroshina, are traveling on the freeway near the Moscow Expo Center. As they drive, Sveta reads aloud from a book about Tamerlane and the legendary Chalk of Fate, an ancient artifact said to have the power to alter one's destiny. Suddenly, their truck radio broadcasts an emergency alert: an old woman has been attacked by a Dark One wielding a long needle, stealing her lifeforce.
Quickly, Anton and Sveta respond to the call and find the woman. Upon spotting the ski-masked attacker fleeing the scene, Sveta races after him, with Anton striving to keep pace. The chase leads them into the Gloom, a shadowy realm. However, when Sveta and the attacker ascend into the second level of the Gloom—a space accessible only to Great Ones—Anton cannot follow. As he calls out to Sveta to return, the Dark One sneaks up behind her, stabbing her with the needle. Sveta manages to unmask the attacker, revealing him to be Anton's son, Yegor, portrayed by Dmitriy Martynov. In a frantic moment, Anton breaks through the Gloom's shield to rescue Sveta from a potentially fatal confrontation.
After this harrowing encounter, the duo finds solace at Cafe Zoar, where they share a drink. Sveta questions Anton's decision to protect the Dark assailant, but Anton remains silent. The leader of the Light Ones, Gesser—who now goes by Boris Ivanovich and is played by Vladimir Menshov—enters the café, reminding Sveta of her lecture later that evening. Gesser warns Anton against engaging in personal relationships with trainees, yet it is already too late; Anton has developed feelings for Sveta. As the evening unfolds, Anton reflects on the tale from Sveta's book about Tamerlane's burial, pondering the significance of the Chalk of Fate as he prepares to return home.
Meanwhile, Zavulon, the leader of the Darks, alongside his fiancée Alisa, a Dark witch, prepares for Yegor's upcoming birthday party at Hotel Cosmos. When Yegor shares his traumatic experience of being chased into the Gloom, Zavulon urgently receives a call about the old woman's attack, prompting him to retrieve evidence that could link his son to the crime. Despite Anton's refusal to comply with a request to access the Night Watch archives, he covertly obtains the ski mask himself. There, Anton uncovers crucial information about Tamerlane's tomb and the Chalk of Fate, learning of Gesser's previously denied request to explore the burial site.
Following the murder of Galina Rogova, Yegor's teacher, suspicions about Anton escalate. The Dark Ones believe that Anton, having been near Galina at the time of her death, may hold the key to understanding the tragedy. In a twist of fate, Gesser manipulates the situation by swapping Anton's consciousness with that of mage Olga. This leads to a series of miscommunications as Sveta, unaware of the switch, confides in "Olga" about her feelings towards Anton. Their bond deepens, but the chaos of the unfolding events begins to encircle them.
As Alisa digs into Anton's past for evidence, Anton—still in Olga’s body—jumps into action while Sveta wrestles with her own emotions and instincts. The pressure mounts, leading to fierce confrontations between the Light and Dark factions. As the stakes escalate, the looming threat of the Inquisition adds urgency to Anton's quest to prove his innocence, leading him onto a path that intertwines with the fate of those he cares about.
Through unexpected turns, betrayals, and unbridled power struggles, Anton races against time, aided by Sveta and Gesser, to unravel the truth, protect his loved ones, and confront the catastrophic consequences of choices made in desperation. With Yegor's birthday party as the backdrop for impending chaos, their world teeters on the edge of destruction as ancient legends resurface and destinies collide.
In a grand finale that blends elements of tragedy and redemption, Anton must face the results of his past decisions and confront the reality that every choice shapes a new future. As convoluted relationships entangle, the echoes of the past interweave with the present, leading Anton and Sveta towards a momentous confrontation that could alter the course of their lives forever.
As the shadows of betrayal and sacrifice loom, the story culminates in a dramatic scene at the birthday celebration, where allegiances are tested, destinies unfold, and the nature of light and darkness are challenged in profound ways.
In the end, the fate of Anton, Sveta, and Yegor—across realms of light and dark—hangs in the balance as the tale of Nochnoy dozor reaches its intricate and explosive conclusion.
