Yona works for a company specialising in holidays to destinations ravaged by disaster. When a colleague touches her inappropriately she complains, and in an attempt to buy her off the company offers a trip to the island of Mui where the major attraction is a sinkhole. Yona realises that the company has plans to fabricate a catastrophe to make the trip more interesting, but after raising the alarm, she discovers she has put her own life in danger. A satirical Korean eco-thriller.