
Dr. Mark Sloan is chief of Internal Medicine at Community General Hospital -- and sometime consultant to the local police department. When he's drawn into a case, he combines sleuthing and medicine to solve the crime. That crime is usually one his detective son, Steve, is working on as a member of the local police department. Dr. Sloan's medical colleagues, including doctors Amanda Bentley, Jack Stewart and Jesse Travis, are also frequently drawn into his investigations.

Dr. Sloan is caught in a police vice raid when he investigates the murder of a prostitute whom he once treated for mysterious bruises.

When a gunman confesses to assassinating the city's mayor during a re-election campaign, Dr. Sloan becomes convinced the man is innocent.

Mark goes undercover at an expensive health spa when a former employee dies in a fiery crash after borrowing Jack's car.

When a friend is found dead in his mansion following an earthquake, Mark is sure that the man was murdered.