Black Jack: Thoughts for Green (1993)

A sinister tree lurks over a village, sheltering the inhabitants for a terrible price. Victims are plagued by voices, then driven to madness and death. When renegade surgeon Black Jack operates on the latest casualty, he discovers a horrifying parasitic plant. Does the tree’s spirit seek to possess a human host? Now the doctor who plays at being god must defy and ancient fury of nature!