An ex-chorus girl lives on the Riviera, supported by a married man she doesn’t know is a crook.

Only a British cabdriver’s (Richard Attenborough) wife (Cathy O’Donnell) and lawyer (Derek Farr) believe him innocent of killing a little girl.

After leaving the British Secret Service, David Somers finds work catalouging butterflies at the country house of Nicholas and Jess Fenton. After the murder of a local gamekeeper, suspicion falls…