On the run from the police, a cunning thief named S. S. Kumar Dharmendra stumbles upon a private invitation addressed to Raja Bahadur Singh Premnath Malhotra for a secret gathering on the island associated with Sir John Locksley Rex Harrison. After witnessing the Raja being shot, Kumar steals the invitation, ferries the injured man to a hospital, and undertakes a bold disguise—wearing a Sikh turban—and pretends to be Bahadur Singh, Jr., the Raja’s supposed son, in order to gain entry to the exclusive event. The ruse kicks off a tense game where appearances must be maintained and every move is watched with suspicion.
Inside the gathering, Kumar encounters a cast of notorious criminals who were invited for a purpose beyond reunion or leisure. There is the mute Colonel Columbus John Saxon, a fearless acrobat named Countess Sylvia Rasmussen Sylvia Miles, a devoted follower of many religions named Dr. Dubari Shammi Kapoor, and a suave, scheming lothario known as K.P.W. Iyengar (Romeo) OP Ralhan. The scenes unfold with a charged mix of wit, danger, and schemes as Kumar’s true identity begins to blur with the others’ expectations, and the line between ally and rival becomes perilously thin. His entrance and demeanor don’t fool everyone, especially his former sweetheart and fiancée Sheila Enders Zeenat Aman, who now works for Sir John.
Sir John Locksley Rex Harrison himself is present, and the real Bahadur Singh Jr. appears at his father’s hospital bedside. Yet Sir John allows Kumar to stay, arguing that Kumar’s seemingly amateur background aligns with the other guests. The host’s darker motive emerges clearly: he has summoned these criminals to see who among them can be trusted to succeed him as a leader, because he is dying of cancer and wants a worthy successor to handle a final, high-stakes test. The pivotal objective is to steal the Shalimar diamond, a jewel valued at 135 crores of rupees, from a fortified room inside the palace. The room is protected by alarms, armed guards, and a surrounding minefield, turning the caper into a deadly contest where failure means death for all involved.
The perilous sequence of events begins almost immediately. Colonel Columbus is the first to die while attempting the heist, and Kumar claims that the mute man had screamed in his final moments, shocking the others. Countess Rasmussen makes an attempted theft next, but she, too, is killed. Dr. Dubari is shown dying during the attempt, though it is later revealed that he had survived the perilous moment. Romeo eventually withdraws from the scheme, only to be killed by Sir John in a brutal turn of events. Then comes Kumar’s turn to act; he stages a bold, ruse-filled effort and succeeds in stealing the Shalimar.
Just as the gem slips from the safety of the vault, the local tribal leaders ambush Sir John, killing the man who had promised them the jewel. What follows is a dramatic twist: Kumar is not the simple thief everyone assumed him to be. He is revealed to be an elite CBI officer on a special mission to arrest the masterminds behind the conspiracy. The tale wraps with the outcome of the dangerous game and, in a fitting turn of fate, Kumar and Sheila Zeenat Aman marry, tying together justice and personal recompense after a rollercoaster of deception, danger, and revelation.
A tale of deception, high-stakes gambles, and the search for trust, this story threads together glamour, danger, and a final twist that reframes every move the players made on the island and within the palace.
