The story begins with five college girls, members of their own band decide to move into a flat together in order for them to be able to jam frequently and concentrate on their music. From time to time, creepy female laughter can be heard throughout the flat which is facing forested hills from which usually happens in the night. One night, while preparing to record a demo, the girls started to hear the creepy laughter. Next morning, when they replay the recording, they discover that the laughter was also captured in the background of the song. Thinking it would not really matter, they decided to upload it on YouTube and unexpectedly, the song becomes a runaway hit. Feeling great about their hit song they decided to compose another song. Unfortunately, the second song flops even though it is a great song. The girls try again with a third song but it also flops despite having a more developed sound. In frustration, the girls brainstorm on why their first song was such a big hit while their subsequent songs bombed. They realized that it was the creepy laughter that made their song a hit and that it came from a Langsuir. After much contemplation, they decided to look for the Langsuir. After searching hi and low, they decided to go back to their flat. On the way back, they took a wrong turn and stumbled upon the Langsuir at an old shack. With a pull of courage they decide to ask for the Langsuir’s help. The Langsuir, after hearing their request, surprisingly agrees to have her laughter recorded. Her only stipulation is that if the songs they record with her voice become hits, she will seek them out for her payment…the girls with much hesitation agreed. The song becomes a hit and the girls are in popular demand. However, the Langsuir was still in the back of their minds. One fine night, the Langsuir decided to pay them a visit and names her price: If they fail to arrange it, the debt will have to be paid in blood… The girls are now in a dilemma. How do they even begin to arrange the Langsuir’s request? What will the langsuir? Should they sacrifice another life for their own? What if the langsuir starts killing them? With these questions haunting them, the girls now know no peace. Should they decide to just do whatever the langsuir wants…or face the consequences?