The Court Marshall and execution of Tommy Hicks for desertion during World War I ignites a feud between the Hammonds and the Hicks, which lasts for 90 years. Duggie Hammond always felt guilty about his forced involvement in Tommy's unjust death. During a ceremony at the village war memorial Tommy's son, Lionel, unveils a plague for his father. Colonel Henry Hammond, who supported the execution, finds the ceremony farcical and lets his feelings be known. When Henry is later executed Barnaby and Jones investigate.
Bledlow village is celebrating the high profile marriage of Sir Ned Fitzroy and Beth Porteous. The wedding reception at Bledlow Hall is buzzing and everything seems to be going well until the Maid of honour, Marina is found pinned to her bedroom wall by a dagger. A fragment of goose quill with a touch of grey is found with the body offering a clue. However when Barnaby and Jones investigate they encounter many hostile witnesses. Will Barnaby be able to find the murderer and give Cully away at her own wedding?
A company belonging to local business man Jack Purdy is building a bypass through the village of Dunstan. Lynne Fox is organising the protesters and collecting names for a petition opposing the bypass when she finds Ron and Libby Wilson dead in their home. Barnaby and Jones are called in to investigate what appears to be a double murder. When Jack is found dead in his car after his brother's stag do. Barnaby has his work cut out to discover the truth behind these killings.
An elderly gentleman watching through binoculars, realises that he has been seen and turns to run. Unfortunately his escape route out of the woods is blocked by a fallen tree. Two weeks later his badly decomposing body is discovered by Brad, a city worker on an off-roading trip with his friends. Who was Charlie Finleyson watching and who would want to kill him? Barnaby and Jones investigate.
Jean Wildacre, magician Aloysius Wilmington's assistant is killed while performing a trick in a children's magic show. As Barnaby and Jones investigate they uncover a world of secret ceremonies and magic circles, namely the Temple of Thoth. When local bookshop owner Hugo Cartwright is also murdered, will Barnaby discover the connection before more victims fall foul of the killer?
Barnaby and Jones are participating in a team building exercise at a local Territorial Army centre when there is a huge explosion at the premises of Parkes Freight. James Parkes, a local womaniser and partner in Parkes Freight, appears to be the target. When Barnaby and Jones investigate they uncover more than a disgruntled ex.