Having identified six possible suspects, Lord Wimsey is all too aware that only one could have killed Campbell. So he begins to eliminate the five red herrings.

Wimsey and his aid arrive at the Galloway Hills of Scotland for a quiet holiday. Wimsey intends to spend his time fishing, and Bunter that of painting, instead they find a corpse. Show more

An artist is discovered dead at the bottom of a cliff, the police presume it was an accident, but Wimsey proves it must be a murder.

In an elaborate reconstruction sequence Wimsey demonstrates how the crime was committed, which forces the murderer to confess and brings the case to a final conclusion.