Conglomerate heiress Mi-hye revisits Jeju with her husband Jin-seop, the site of their honeymoon. They have a pleasant time under the guidance of tour guide Sang-geun. Mi-hye meets Yu-ra at a nightclub and invites her to join their trip. However, Yu-ra is having an affair with Jin-seop and intentionally approached Mi-hye with the aim of stealing her fortune. Sang-geun accidentally witnesses a meeting between Yu-ra and Jin-seop and instinctively senses the plot. Yu-ra and Jin-seop lure Mi-hye to a cliff under the pretense of taking photos, and Jin-seop embraces Mi-hye and pushes her off the cliff. The police investigation concludes that Mi-hye drowned because she couldn't swim, but she was actually rescued by Jong-geun and took refuge in his home. Mi-hye, vowing revenge, ignores Jong-geun, who wants to report to the police, and lures them both to the cliff from which she fell, stages a car accident to kill them, and then flees.