The Bloody Devil, Part One (1965)

Kwok Sau-yuk fails to ward off the advances of Scholar Four Poisons while mourning the murder of her husband. Master Chung comes to help and asks Kwok's son Chan Lam to look for his daughter Siu-chui before dying. Hurled into the Blood Pool, Chan chances on Ng Yau-nin, a victim of the intrigue hatched by his wife Ho Yim-wah and her lover Oh Yu-kan. Ng bequeaths to Chan a sword, and the Book of Blood Devil Moves unearthed from the cave and entrusts his daughter Yu-ying to his care. Having mastered the art, Chan emerges from the abyssal waters and becomes the 'Little God of Hades.' He is soon kept under lock and key by Oh who wants the Book of the Yellow Emperor. Treating Chan with a antidote, Yu-ying escapes with Chan after learning his father’s intrigue, only to be hit by a pang of loss and agony upon Chan's reunion with senior master Lee Kei and Siu-chui, his betrothed fiancee. Instigated by Oh, Chan finds himself confronting members of the seven leading martial sects…

Unfortunately the movie The Bloody Devil, Part One is not yet available on Disney Plus.