Yū Numazaki

Fukami, a secretary engaged to company president Kaido, her employer, is invited by his close friends, the Nogis, to a three-day-two-night tour. The tour group is traveling in a luxurious coach to Lake Megami in the Tateshina Plains. On the way, they are disturbed to hear that Shirai, a hostess who was supposed to come along on the tour, has been murdered. And the next day, the body of Hasegawa, another tour member, is floating in Lake Megami...

An office lady joins a "mistress bank", starts falling in love with her client and gets involved in a murder case.

A man she was once in a relationship with has been killed. A wife keeping a secret from her husband gets involved in a strange case.

After a highly successful raid on Singapore Harbour, soldiers of Z Special Unit lead a new expedition in Singapore, with disastrous results.