The year is 1932. You are Dr Kinn Tenor, a Scotland Yard pathologist with a sideline in private detection when the boys in blue are stumped. You’re celebrated in the newspapers, but you tend to get the official police’s backs up – they don’t take kindly to being upstaged.

Two days before Christmas, you attend the opening of your friend Johnny McAlister’s ritzy new nightclub, the Golden Star. There you meet his cousin, Melissa Thresh – she is being followed and would like you to identify the culprit. But you have also promised your friend Algy Hurley to visit his family seat in Kent, where some poison-pen letters have been causing unrest.

If you travel to Yorkshire with Melissa, you’re caught up in a locked-room murder mystery featuring a cast of dubious friends, relatives and business associates
If it’s Hurley Court, you’re embroiled in a country house whodunnit involving an old family ritual and generations of hidden secrets

This is just the first of many choices you must make: will you pursue this thread? Chase the mysterious stranger? Lay a trap for the guilty party?

The decisions you make will take you on your own path to the final unmasking of the villain – or failure. What will you choose? And can you unravel the mystery without losing your festive spirit, your reputation… or your life?