8 Remains (2018)

A woman is strangled by her lover on her birthday. Just as she's about to die, time itself seems to stop. She finds herself in a shadow world, a distorted mirror of reality. Caught between life and death, she must relive the hours prior to her murder. When she finds herself attacked by him again, she manages to fight him off long enough to slip away. She escapes through a door, which only leads her deeper down the rabbit hole.