Chị Em Lăng Nhăng, The Sister of Ursula (1978)
Chị Em Lăng Nhăng 1978 Vietsub, The Sister of Ursula 1978
While searching for their estranged mother, two beautiful sisters, Dagmar and Ursula, arrive at a luxurious seaside hotel. At the same time, a mysterious killer starts murdering promiscuous women in the area.