Ja-young and her friends set out to create a video called "Spirit Summoning That Tells You Everything" to enter a YouTube competition offering a cash reward. They initially intend to make it a fictional story, but as they start filming in the water tank of an abandoned building, their project takes an unexpected turn. The line between reality and imagination begins to blur, leading to unforeseen and terrifying consequences. This story explores themes of curiosity and the dangers of delving into the unknown. It highlights how a seemingly harmless creative project can spiral into a nightmare, resonating with viewers who enjoy suspenseful and psychological horror. The films atmosphere and suspenseful buildup make it a compelling watch, emphasizing the importance of respecting forces beyond understanding.