It's Christmas and the Diamond Brothers – the world's most defective detectives – are back with a new case to solve in this hilarious spoof detective tale.

Once again, Tim Diamond and his younger brother Nick are flat broke. So when they're hired to investigate an anonymous death threat made to world-famous pop singer and movie actress Minerva, they jump at the chance. However, the Greek celebrity seems to have plenty of enemies – so the question is, which one actually wants her dead? Meanwhile, Tim needs to resist Minerva's amorous advances and focus in the matter in hand...