Quick Transmigration: The Scumbag Identification System

Ming Lan, doomed to die alone, meets an untimely end. After death, she becomes a grudge-cleansing master in the underworld, traveling through different eras to save souls hurt by scumbags. Along the way, she unexpectedly discovers the truth about her origins and meets a mysterious man whose loyalties are hard to read. What will happen between them? The answers will slowly come to light...