So, this novel's setting is the cultivation world or maybe an Ancient One. Where the female lead (she's a sect leader) finally got the treasure she had wanted so badly. But her disciple (ML) betrayed and later revealed that he didn't mean to kill female lead and everything was accidental. But of course she didn't know. So she wandered as a ghost while carrying her resentment. One day she could possess a girl then they made a deal. that's where she decided to come back to her sect. She was confused why the Male lead built her a tomb and still paid her respect. And, the plot twist is actually the Fl didn't die, and the tomb was empty. Her real body was in coma and hidden by the ML.