在这部哥本哈根谋杀案悬疑/犯罪片中,When the boss of Calder’s Biscuit Company is murdered in Copenhagen, Barnaby and Nelson join forces with two female Danish detectives, the abrasive and astute Poulsen and the charming and cool Degn. They discover Eric Calder had more linking him to Copenhagen than just his famous Golden Clusters.
Midsomer biscuit tycoon Eric Calder is poisoned by one of his own biscuits whilst in Copenhagen to seal a contract with businessman Albert Toft. As the goods were sent from Midsomer, detective Birgitte Poulsen asks Barnaby to investigate. He finds that Eric's son Harry had no interest in the family firm but had recently rowed with Eric whilst his wife Penelope has been having an affair with his brother Julian. Also in the frame is chief baker Armand Stone, a man with a good knowledge of chemistry. Julian is also murdered, drowned in whisky, but Barnaby and Nelson fly to Copenhagen from where a floral tribute was sent to Eric's funeral, paid for by a credit card stolen from Pastor Thomas Madsen. They find that Eric has been involved for many years with Ingrid Madsen, by whom he has a daughter. Whilst Barnaby works out the identity of the daughter there are more deaths back at Midsomer and he must link them with the killings of Copenhagen.