Parthiban "Parthi" is an animal rescuer and cafe owner residing in Theog, Himachal Pradesh. He lives a quiet life with his wife Sathya, his teenage son Siddharth "Siddhu" and daughter Mathi "Chintu". One day, his friend Joshy Andrews, a local forest ranger, reaches out to him for assistance in dealing with a dangerous spotted hyena that has been terrorizing the town. This hyena, known for its rabid behavior, has already attacked several locals, and the police are unwilling to take any action against it. With the help of his son, Parthi successfully tranquilizes the ferocious beast, understanding that hyenas are social animals and this one is likely lost or separated from its pack. Opting for discretion, he adopts the hyena, naming it Chakadbangadu, after ensuring it is safe.
Parthi runs the cafe Bold Street, where he continues to lead a peaceful life until one night, fate drastically alters his circumstances. When Shanmugham, a ruthless robber played by Mysskin, and his gang come to rob his cafe, the situation spirals out of control. Shanmugham's crew has blood on their hands, having brutally murdered a family, and they target Parthi next. After a series of escalating conflicts, Parthi shifts from being a victim to a defender when one of the gang members attempts to harm his employee, Shruthi. Enraged, Parthi retaliates, leading to a violent confrontation where he kills Shanmugham’s gang.
Despite acting in self-defense, Parthi finds himself arrested, but he’s soon released. As his image spreads through newspapers, it catches the attention of gangster Harold Das, who believes he recognizes Parthi as his missing brother, Leo Das. In a tense turn of events, Parthi's life becomes a dangerous game of cat and mouse, as Shanmugham’s relatives attempt to kill him and his family in retaliation.
Seeking protection, Parthi requests police assistance, but faces ridicule from Officer Bhawar Jetha for his situation. As violence mounts, Parthi fortifies his home and prepares for war. Meanwhile, Antony, portrayed by Sanjay Dutt, arrives to confront Parthi, convinced he is indeed Leo. The confrontation sends shockwaves through Parthi's family, forcing them to dig deep into their past, with Sathya uncovering troubling secrets about Leo’s history.
In a dramatic climax, Parthi’s son is kidnapped, and he must navigate a web of betrayal and bloodshed to rescue him. With the help of Napoleon, a police officer, and his own ingenuity, Parthi fights to protect his family against Harold’s men. As chaos unfolds, the hyena also plays a surprising role in defending them.
Ultimately, Parthi confronts Harold in a final showdown, where he reveals his identity as Leo while delivering justice for the atrocities his family has faced. With the factory linked to the criminal underworld consumed in flames, he aims to reclaim his life. However, the peace is short-lived as a mysterious caller hints at the pervasive drug problem throughout India, leaving Parthi with the burden of his dual identity and the fight ahead.
In the end, in a world rife with turmoil, Parthi realizes that the shadows of his past will continue to loom over him, as the call serves as a reminder that his battle is far from over.
