Along the rugged Welsh coastline, Bobby Jones finds a dying man at the bottom of the cliffs; as Bobby tries to ease his final moments, the dying man utters a mysterious question.

Following a shocking death thought to be suicide, Bobby and Frankie are convinced it was murder; together, they hatch a plan to infiltrate Frankie into the home of their prime suspect.

As Frankie and Bobby dig deeper, they begin to uncover a dark conspiracy.

A dying man's enigmatic last words send vicar's son, Bobby Jones, and his socialite friend, Lady Frankie Derwent, on a crime-solving adventure.