In 1925, a country house party prank turns deadly. Lady Eileen "Bundle" Brent investigates the chilling murder plot. Lady Caterham and Superintendent Battle assist in solving the country house mystery that changes Bundle's life.

England, 1925. At a lavish country house party, a practical joke appears to have gone horribly, murderously wrong. It will be up to the unlikeliest of sleuths—the fizzingly inquisitive Lady Eileen 'Bundle' Brent—to unravel a chilling plot that will change her life, cracking wide open the country house mystery.