Phryne Fisher, her sister Beth and her faithful maid, Dot, take a trip
to an amusement park with Phryne's two daughters Ruth and Jane. But in
the dusty dark Ghost Train, a mummified bullet-studded corpse falls to
the ground in front of them. Digging to the bottom of this long-standing
mystery takes her to the country town of Castlemaine where it soon
becomes obvious that someone is trying to muzzle her investigations.
Meanwhile, Phryne's lover Lin Chung has his own mystery to solve.