On her 19th birthday, Sofia learns from Uncle John that her mother Mary was murdered by Sofia's own father, Logan, and her grandmother. The confession comes amid whispers of a haunted house and a cursed tree where Mary's spirit lingers, singing a lullaby that echoes through the empty halls. John explains that Logan forced Mary into a loveless marriage to seize control of the family fortune, and after Sofia's birth, the abuse intensified, driving Mary to plan an escape.
Consumed by grief and rage, Sofia vows to uncover the truth. She teams up with John and Gilbert, the reluctant son of Logan's former manager, who initially doubts her but is drawn in after receiving ominous threats. The trio discovers hidden recordings where Mary confronts Logan, exposing his cruelty and manipulation.
Their investigation leads them to a secret palace and Logan's sealed office, where they hope to find proof of his crimes. The journey forces Sofia to confront her past, the ghost of her mother, and the tangled web of lies that binds her family. With danger lurking at every corner, she must decide whether to trust Gilbert and John-or risk losing everything to the darkness that claimed her mother.
Investigating the room, they uncover many secrets and travel to the US to follow a critical lead, discovering something even more disturbing. Upon returning home, they expose the final truth: