A Sikh father hired a hitman to kill his own daughter claiming it would restore family honour because she had a Jewish boyfriend, a court heard.
But the man Kalwinder Dosanjh, 51, approached to kill his daughter Sanjit, 22, was an undercover policeman, the Old Bailey was told.
Mr Dosanjh, of Higham Road, Rochester, Kent, denies three charges of soliciting murder and firearms charges.
He was arrested after an undercover police operation, the court was told.
Brian Altman, prosecuting, said Mr Dosanjh, a devout Sikh, wanted to restore his family's honour after Sanjit left the family home with her boyfriend in secret in 2001.
Mr Dosanjh is alleged to have wanted to kill his daughter, her boyfriend, Temple Jazac, and Malcolm Calver, a man he mistook for Mr Jazac's father.
Mr Dosanjh was caught when the hitman he hired to shoot the three people turned out to be an undercover police officer, said Mr Altman.
A sawn-off shotgun and ammunition were found in his van when he was arrested in September 2003.
"These were to be honour killings," Mr Altman told the court.
He added: "Dosanjh wanted these three individuals killed for no reason other than to preserve his and his family's honour in the Sikh community, of which he and his family were devout members.
"He was happy to see his own daughter dead as well as the man she loved."
The court was told Jagjit Singh Rai, 53, of Goodmayes Avenue, Ilford, pleaded guilty to similar offences in June, and Mr Altman said he was regarded as a middle man.
Rai and Mr Dosanjh were arrested after an undercover operation lasting several months.
"Killing them was a way of dealing with the grave dishonour and disgrace that that had visited in his family," said Mr Altman.
"It was his intention to have three people shot dead, including quite remarkably, his own daughter."
The trial continues.