Paul Dangerfield promises to keep a deadly secret - for 24 hours. Stephen Millwood, an old patient of Paul's, is accused of committing arson to claim the insurance money to support his family. Arrested for murder and arson, Stephen tells Paul that he admitted to the crime that his wife Angie really committed. Stephen tells Paul he has AIDS but his first concern is his daughter Sophie, who is about to take an important exam. He persuades Dangerfield to speak to an unconvinced Ken Jackson to get him bail so he can return home.

Meanwhile, concerned father Mr Heath brings his daughter Clare to the surgery and demands that she is seen immediately. Later, at school, Clare collapses and is rushed to hospital, where her pregnancy is revealed but the foetus is in the wrong place. She insists her father is not told the truth but it could spell trouble for the practice, when Mr Heath threatens to sue.

As Paul, Al and Kate enjoy a game of armed combat, Marty packs a bag and leaves home, feeli