Chinese detective Lin Moli, who became famous in London because of the Sisle case, was entrusted by Duke Valentine to come to Corsi Island in the southern hemisphere to help find the lost notebook, but unexpectedly encountered murders one after another.
The wealthy businessman Eremo committed suicide by jumping into the sea, his eldest son Richard was stabbed to death in his study, Duke Valentine was poisoned, and his second son Jeff was nagging.
The malfunctioning cruise ship, corpses appearing one after another, and the missing notebook. ..
Panic, uneasiness, and haze hang over everyone's head
Housekeeper, maid, eldest daughter-in-law, where is the murderer hiding?
Purpose: Detective, decryption