Plot Analysis Summary
A murder investigation expands into a Taiwan-based conspiracy involving betrayal, historical diamonds, and a dangerous aerial escape.
Story Structure — 5 Plot Phases
Letters Beneath The Snow
Threatening letters connect three men to a past murder. A ski slope killing and a mysterious flight booking draw the cleared pilot toward Taiwan.
Key Events
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Threatening Letters Arrive — Three men connected to a Taiwanese murder receive letters signed with the initials K.M. and a skull.
Location: Taiwan and Japan
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Ski Slope Murder — Mr. Yajima, the first letter recipient, is killed on a ski slope.
Location: Ski slope
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Pilot Becomes Suspect — A Tokyo pilot becomes the prime suspect, but ballistics clear him of the killing.
Location: Tokyo
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Diviner Predicts Taiwan — A diviner tells the cleared pilot that he will travel to Taiwan.
Location: Tokyo
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Mysterious Flight Booking — The dead Mr. Yajima mysteriously books an MU-2 flight to Taiwan for the pilot.
Location: Tokyo airport
Bodies Across The Strait
A body is discovered aboard the MU-2, followed by an attack after landing. A temple meeting confirms that another recipient faces imminent danger.
Key Events
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Body Found Aboard — The pilot and a Taiwanese journalist discover the diviner's body in a trunk belonging to a tourism president.
Location: MU-2 aircraft
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Attack After Landing — Men working for the tourism president attack the arriving travelers, who escape.
Location: Taiwan airport
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Night In A Brothel — The pilot is dragged into a brothel, where a kind worker lets him spend the night.
Location: Brothel
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Temple Meeting Request — Mr. Kitazawa sends a note requesting a meeting at the Confucius Temple. Characters: Mr. Kitazawa
Location: Taiwan
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Second Threat Confirmed — Mr. Kitazawa says he received the same note, suggesting another attack is imminent. Characters: Mr. Kitazawa
Location: Confucius Temple
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Car Explosion — Mr. Kitazawa leaves the temple, and his car explodes immediately afterward. Characters: Mr. Kitazawa
Location: Outside the Confucius Temple
The Diamond Conspiracy
A drugging plot is interrupted by Fumio Kuroki, who reveals the historical diamond motive. A funeral surveillance operation leads to a hidden route toward Hell Valley.
Key Events
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Drugged Drinks — The tourism president drugs the visitors' drinks and plans a staged plane crash.
Location: President's residence
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Journalist Stages Rescue — Fumio Kuroki saves the drugged travelers and reveals the murders' connection to seized diamonds. Characters: Fumio Kuroki
Location: President's residence
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Diamond Motive Revealed — Fumio Kuroki explains that twenty billion yen in diamonds was seized during the Japanese occupation. Characters: Fumio Kuroki
Location: Taiwan
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Funeral March Surveillance — The investigators attend Mr. Kitazawa's funeral march and are spotted by the tourism president. Characters: Mr. Kitazawa
Location: Funeral march
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Escape Into The Trunk — The travelers fake a crash into a gorge and secretly hide in the pursuers' trunk.
Location: Mountain road
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Hideout Destination Discovered — Hidden inside the trunk, the journalist learns that the group is heading to Hell Valley.
Location: President's hideout
Hell Valley Betrayal
The stolen gems are unearthed, but an assistant betrays the group and Mr. Kitazawa's death is exposed as a deception. The conspirators turn on one another.
Key Events
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Gems Unearthed — The tourism president and his men dig up the stolen gems at Hell Valley. Characters: Mr. Kitazawa
Location: Hell Valley
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Alliance Betrayal Revealed — The assistant shoots the men, and Mr. Kitazawa is revealed to have faked his death and planned the betrayal. Characters: Mr. Kitazawa
Location: Hell Valley
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President Rai Killed — Mr. Kitazawa and the assistant kill the tourism president before escaping in separate cars. Characters: Mr. Kitazawa
Location: Hell Valley
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Fatal Mistaken Shooting — While attempting to kill the pilot, Mr. Kitazawa accidentally kills his own assistant. Characters: Mr. Kitazawa
Location: Road near Hell Valley
The Final Flight
Mr. Kitazawa attempts to escape with the gems but is defeated aboard the MU-2. A medal ceremony and Fumio's confession precede the pilot's comic parachute escape.
Key Events
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Aerial Plane Struggle — Mr. Kitazawa boards the MU-2 with the gems, but the pilot climbs aboard in flight and overpowers him. Characters: Mr. Kitazawa
Location: MU-2 aircraft
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Kitazawa Thrown From Plane — The pilot throws Mr. Kitazawa out of the aircraft, ending his attempt to smuggle the gems to Japan. Characters: Mr. Kitazawa
Location: Above Taiwan
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Medal Ceremony — The pilot receives a medal in Taiwan, and Fumio Kuroki attends the ceremony. Characters: Fumio Kuroki
Location: Taiwan ceremony
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Fumio Reveals His Identity — Fumio Kuroki admits that he is the son of the murdered Taiwanese man. Characters: Fumio Kuroki
Location: Taiwan ceremony
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Return Flight Diverts — Bad weather forces the return flight toward Taiwan, so the pilot parachutes out to avoid returning. Characters: Fumio Kuroki
Location: Airplane
Pilot Mitarai Ken is mistaken for a murder suspect after a dying man leaves his name. Sent to fly to Taipei with journalist Xiang-lan, he discovers a corpse on board and killers waiting at Songshan Airport. Co-produced by Ninjin Productions and Taiwan's Kuo Kuang Motion Picture Company, the film turns planes, cars, streets, and nightclubs into the machinery of a transregional thriller. Bai Lan shifts from her familiar tragic persona to an active reporter in a Japanese–Taiwanese genre production.