Erotic Journey: Love Affair in Hong Kong (1973)

Akiko is a housewife who is bored with her relationship. She lives an adulterous passion with a colleague of her husband, decides to follow him to Hong Kong where he has just been transferred. Akiko's husband goes out looking for them, without success. Desperate, he lets himself be dragged into the underworld of the city by a mysterious Sino-Japanese mongrel who plunges him into drugs, pimping. Until the day he finally learns the terrible truth about his unfaithful wife.