Captain

Vetri, an orphan, is raised within an army school where discipline and duty define his life. He forges a tight bond with his team—Karuna, Sheikh, Rekha, and Karthi Devan—whose unity becomes legendary for covert missions. This early bond sets the tone for their future collaborations and loyalties.

The team is tasked to investigate Sector-42, a forest area once hosting a mineral factory under British rule. For fifty years, strange activities have kept people away, and a prior expedition vanished without a trace. The task hints at danger beyond an ordinary reconnaissance.

While exploring Sector-42, the team is attacked by a mysterious Minotaur. Vetri regains consciousness to find Karthi attempting to shoot himself, and Vetri pleads with him not to. Karthi dies when he is shot in the shoulder, and Vetri takes sole blame for the failed operation.

Vetri refuses to blame Karthi and takes full responsibility for the mishap, earning him a punishment posting as a training officer. Karthi is branded a traitor and denied a military funeral, a blow that haunts Vetri and solidifies his resolve to uncover the truth later.

Dr Keerthi, studying the Minotaur threat for the defense ministry, partners with Vikram to establish a lab near Sector-42. They experiment with the creature’s bio-radio signals and how to study its behavior, laying the groundwork for a full-scale field mission. The lab becomes the focal point for both discovery and danger.

Keerthi presses to use Vetri and his team for the operation, even as General Bala harbors reservations about trusting Vetri again. The decision underscores Vetri's prior experience and the team's proven cohesion. Their selection signals a turning point in Vetri's career.

The mission begins with a Minotaur raid; Vetri nearly kills one with a bomb and brings the creature to the lab. The Minotaur is unconscious but still transmits a signal that awakens other Minotaurs through its spider network. The team witnesses first-hand how dangerous the beasts can be.

Minotaurs communicate via bio-radio signals carried by spiders, enabling a coordinated attack pattern. Keerthi and Vikram adapt their approach and the team uses an armored tank to reach the forest and locate the larger Minotaur. The discovery hints at a network of beasts rather than isolated threats.

Keerthi tests a theory against the Minotaur by using a morphine-based approach derived from Vetri’s blood, revealing a potential weakness. Meanwhile, Vetri hints that memory gaps from the earlier attack are part of the danger, adding to the mystery of their adversaries. These insights shape the team’s strategy moving forward.

The team traces the disaster to a water body near the old factory and uncovers evidence of a rescue attempt gone wrong. Vetri discovers a mobile phone with vlogs detailing the factory restoration and the ulterior motives of Keerthi’s company. The revelation reframes the Minotaur threat as a cover for corporate greed.

Vetri confirms that Karthi had been consuming morphine since a previous mission, explaining his frailty and the chain of decisions that followed. This context reshapes Vetri’s guilt and the perception of Karthi’s sacrifice. The truth helps Vetri preserve Karthi’s legacy rather than blaming him.

Vetri proposes to kill the giant Minotaur in the early hours, a plan backed by the team’s hard-won knowledge. They decide to proceed without Keerthi, as trust in her could jeopardize the operation. The deception sets the stage for a high-stakes confrontation.

The team traps and fights the giant Minotaur; Vetri engages in a brutal struggle, nearly drowning in the process. He ultimately kills the huge creature and reveals that the Minotaur's next generation is being safeguarded. Their success hinges on keeping the truth about the kill from Keerthi and Vikram.

With the Minotaur threat neutralized but corporate scheming exposed, Sector-42 is ordered shut down and civilian access forbade. Vetri is reinstated in the field and Karthi’s funeral is held with full honors. Vetri learns Kavya is Karthi’s sister, forming a new romantic bond built on shared grief and resilience.

In the post-credits scene, a fresh generation of Minotaurs awakens underwater, emitting bio-radio signals that suggest a renewed threat on the horizon. The ending hints at future danger and the resilience of Vetri’s team.