An apparent suicide turns into a murder investigation when it's discovered that the dead man would not have been able to kill himself because of his debilitating disease. The plot takes an unexpected turn when the dead mans wife turns out to be someone that Morse had wanted to marry many years earlier. Someone in fact he still has feelings for.
The plot has equals and better in the wonderful series that is Morse, however, it stands out as one where Morse shows that even he has feelings. Further more the excellent relationship between Morse and Lewis is shown in a new light.
The end especially so, when Lewis is shown throwing evidence that would have shown Morses previous love as the murderer. An selfless act by Lewis that is made only to protect the feelings of his boss Morse.