The INS Karmaveer hadn't moved in twelve years. Moored off Visakhapatnam as a museum piece, her brass was polished, her torpedo tubes sealed with rust, and her legend—like the 1971 war she'd survived—was a fading whisper. But tonight, a freak cyclone dragged her anchor chain. She drifted, silent and dark, into the Bay of Bengal.

But he had one thing: the old submarine's soul.

A lone sonar operator aboard a rusting decommissioned submarine must outwit a modern stealth warship after his vessel is mistaken for a ghost from a long-finished war.

Then the voice crackled over the emergency frequency—encrypted, but his museum's old receiver picked it up. "Ghost Target is active. Echo profile matches… Ghazi class. Repeat, we have a phantom contact. Torpedo warm-up authorized."

The hum faded. The sea grew quiet.

He opened the forward ballast valves, creating a curtain of bubbles that sounded like a torpedo launch. He struck the hull with a sledgehammer in morse code: SOS FRIEND . He fed the sonar a looped recording of his grandfather's voice singing an old Navy song, making the AI register multiple human heat signatures.