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Synopsis

Vijay Prakash is a RAW agent who encounters agent Walrus, who hands him a metal key before dying. Vijay and his colleagues at the agency eventually crack what the key represents. They discover a video of former agent Zara debriefing her mission, in which she reveals details of Operation Doku. During the operation, she and agent Sardar successfully brought a medicine from Japan that could serve as an antidote to a bioweapon. Many years later, they face a new threat from a man called Black Dagger, who is trying to find three keys that can activate the old bioweapon. At the same time, they discover that Sardar was never killed and is still alive. How do the father-and-son agents stop Black Dagger’s mission? That forms the rest of the story.