Yona has been stuck behind a desk for years working as a programming coordinator for Jungle, a travel company specialising in package holidays to destinations ravaged by disaster. When a senior colleague touches her inappropriately she tries to complain, and in an attempt to bury her allegations, the company make her an attractive proposition: a free ticket for one of their most sought-after trips, to the desert island of Mui.
She accepts the offer and travels the remote island, where the major attraction is a supposedly-dramatic sinkhole. When the customers who've paid a premium for the trip begin to get frustrated, Yona realises that the company has dangerous plans to fabricate an environmental catastrophe to make the trip more interesting, but when she tries to raise the alarm, she discovers she has put her own life in danger.
