It's open season at Penford Manor! But someone has murder in their sights...

At Penford Manor, the guests are arriving to celebrate the start of the grouse-hunting season: lords and ladies, barons and baronesses, a Member of Parliament - and chemistry graduate turned detective, Miss Clara Vale, an old friend of the family. But Clara is no ordinary guest: she's secretly investigating a blackmail plot against Lady Penford herself.

Someone in the house is already up to no good, but when the body of a local trade unionist is found in the grounds, Clara's case gets even more complicated because a clue left by the body links it to the blackmail note.

Who has discovered Lady Penford's secret? Can Clara and her trusted assistant Bella work together to find the murderer? And what do the cornflowers which keep popping up everywhere mean?

Amidst the glittering dresses and sparkling conversation of society, Clara must find the truth - before the killer acts again!