Account Rendered

Lucille Ainsworth is married to Robert Ainsworth (Griffith Jones). She has commissioned her portrait to be painted by an artist, Clive (John van Eyssen) as a gift to her husband. Clive is also her lover.

When Lucille sees the portrait, she hates it. She goes to Hampstead Heath, where she is later found murdered.

Afraid he is going to be accused, her husband fakes an alibi with his business partner, Gilbert Morgan (Carl Bernard).

Meanwhile, Lucille's best friend (Honor Blackman) is in love with Robert. It falls to two police detectives to discover the murderer, which they do with careful police work. They trace a coat back to its original owner, and figure out how one person could be at the murder site, despite having an alibi -- too far away to reach the murder scene at the right time.