Curly Sister lives alone in an old apartment on the edge of the city. Her life is ordinary, but her peace is broken on a rainy night. A 120 ambulance suddenly stopped in front of the apartment building, and the mysterious stretcher figure carried out made Sister Curly feel suspicious, and she was haunted by nightmares that night. After that, the siren of the ambulance rang in front of the window on time every night, and the mysterious man covered in blood repeatedly appeared in her dreams, which seriously affected her life and work.
After encountering the unmanned ambulance again, it was her father who had been dead for many years who stepped out of the car. He shouted "Help me", pushing Sister Curly into the abyss of fear, causing her to faint on the spot. After waking up, Curly Sister was determined to uncover the truth behind this series of supernatural events. However, every in-depth investigation revealed that the information about the ambulance had been deliberately buried, making it impossible to get started.
But Sister Curly Hair did not flinch. In a silent night, when the ambulance carrying countless weird secrets appeared again, Sister Curly Hair took courage and walked towards it resolutely. From then on, she stepped into a supernatural world full of horror and unknowns that had been sealed for many years. In this world, reality and illusion are intertwined, and she will face the dust-laden secrets of her family, as well as a past covered up by time and filled with blood and tears, all of which are inextricably linked to the 120 ambulance. Can she solve the mystery and save her and her father's souls, or will she sink deeper and deeper into this endless supernatural whirlpool...