Anthony Kaun Hai?

Master Madan, an underworld killer, tracks down a debtor in Bangkok and takes Anthony Gonsalves hostage. He threatens to kill Gonsalves if the debt isn't repaid within two hours. This sets a tight clock on the events that follow.

The man tells Champ that he is not the Anthony Gonsalves Madan is after. Champ reveals his real name, Champak Chaudhary, alias Champ, and explains his life forging passports and documents. The exchange hints at Champ's own murky past.

In jail, Champ encounters Raghu, a diamond thief who appears deaf and dumb. Raghu offers Champ half of his 100 million THB diamonds in exchange for helping him escape. Champ initially refuses to risk his own release for a dangerous plan.

After Champ is released, he discovers Roza is married to another man and pregnant. Upset, he agrees to Raghu's escape plan and uses a forged release notice to help Raghu break out. This deepens Champ's involvement with Raghu's scheme.

The real Anthony Gonsalves is a journalist who records Luck Sharma murdering a girl and uses the footage to blackmail him. Sharma kills the journalist in retaliation. Lashwani's autopsy on the real Gonsalves creates a new identity, and Champ ends up with the name Anthony Gonsalves; he and Raghu then meet Jia.

Champ, now using the Gonsalves name, and Raghu receive their new identities and re-enter life. They soon meet Jia, Raghu's daughter, and Champ begins to grasp the stakes of his alias and the danger around them.

Lucky Sharma's men realize Gonsalves is alive and plot to finish him off. Champ escapes the would-be killers, but Raghu dies in the shootout that follows. The danger surrounding the impersonation intensifies.

Jia tells Champ that her father buried the diamonds in a jail yard, now accessible to him. Champ falls in love with Jia and learns the true story of Anthony Gonsalves. He decides to cooperate with the police and asks to be jailed as a witness.

In jail, Champ digs out the diamonds and sends them one by one to Jia via a pigeon, keeping them out of reach of the criminals. The act solidifies his commitment to Jia and the case against Sharma.

Champ hands the CD containing the murder footage to inspector Suraj Singh, leading to Lucky Sharma's arrest. The case gains credible momentum with solid evidence against Sharma's network.

Master Madan supports Champ and even shoots Sharma's men who come to kill him. He lends his Ferrari to Champ to reach the airport where Jia is expected to board her flight, enabling a climactic reunion plan.

Champ arrives at the airport and sees Jia just before she boards. They confess their love and reunite, choosing a hopeful future together despite the danger that surrounded them.