A prominent London psychologist seems to have taken his own life, causing stunned disbelief amongst his colleagues and patients. His teenage daughter refuses to believe it was suicide as this would go against all of the principles her father stood for, therefore she is convinced it was murder. She enlists the help of a former patient to try to get to the truth. However, the truth turns out to be both surprising and disturbing.

The deputy manager of a London bank has worked out a way to rob the branch of £200,000. When he becomes involved with the attractive Lady Dorset he decides to go ahead with his plan. He needs her help and that of her philandering spendthrift husband. It all comes down to a matter of trust.