David Graham, a recovering alcoholic, returns to
England having only one day in which to save his son Alec from
hanging for the murder of Alec's girlfriend, Jenny Cole. Graham has been a neglectful, absentee father who missed the entire trial while he was in a
sanatorium in
Canada. At first, Alec refuses to see Graham, and when they do meet, Alec is without any hope for reprieve and cannot show any affection for his father. His sobriety in constant jeopardy, Graham believes that his son is innocent and begins a frantic last-minute effort to find evidence that will save his son's life, if not redeem himself as a father. With the help of his son's steadfast solicitor, Graham desperately, and often ineffectively, investigates the circumstances surrounding the girl's murder, visiting first her furious sister and then the home of wealthy car magnate Robert Stanford, where the girlfriend was killed. Stanford and his family have provided the only real support that Alec has ever known. Graham ricochets between potential allies, foes and new leads in order to learn who the real murderer could be, with suspects including Stanford's beautiful wife Honor, his even younger secretary Vickie Harker, and his adopted son and Alec's best friend, Brian, who allows Graham to see what his own misspent life looked like through his son's eyes. With the
Home Office on standby to receive any evidence proving Alec's innocence, Graham is forced to extreme measures to try to establish the real killer's guilt. In a private room, Graham is permitted a final meeting with his son, with Honor there. Alec passionately kisses Honor, adding a new dimension. The conversation also alludes to Alec's relationship with Jenny. Honor leaves to allow father and son a final embrace, and more confessions are made. Graham visits a pub with Stanford and gathers some more clues before getting very drunk. At Vickie Harker's home, he learns that Stanford's alibi of spending the night with her was not true. He confronts Stanford at his race track where he is test-driving a
Mercedes 300SL. Stanford explains that anyone can be bought and offers Graham shares in his company in exchange for silence. Still lacking evidence, in desperation Graham sacrifices his own life to create the appearance of a second act of murder by Stanford, thereby incriminating him for the first killing and saving Alec's life. ==Cast==