The Mystery of the Lake

There is a young girl named Siana who has been cursed by the lake. She is trapped in the lake, and at midnight, she has the right to leave. She can stay out until 12:20, but she must return to the lake by then. If she refuses to go back, she will die. One day, a man begins visiting the lake regularly, and he falls in love with Siana. Siana tells him, "You can save me." He asks, "What must I do?" She replies, "You must..."