The Rivals is a 1964 British second feature film directed by Max Varnel and starring Jack Gwillim, Erica Rogers and Brian Smith.
[1] Part of the series of Edgar Wallace Mysteries films made at Merton Park Studios, it is based on a story by Wallace.
Rolf Neilson, Kim Harris and Steve Houston are a trio of car thieves.
They steal a car and in the glove compartment find a beret with a brooch, and a ransom note demanding £75,000 addressed to Rolf Neilson, a wealthy man whose daughter has been kidnapped.
They realise they have stolen the abductor's car, and with the beret they can collect the ransom themselves, without needing the daughter.