Soon-jae, Mun-hee, Joon-ha, and Hae-mi decide to take a trip to Anmyeon-do Island for Soon-jae and Mun-hee’s wedding anniversary. Mun-hee is excited and begins planning things for the trip. However, Hae-mi keeps on changing her mind, Joon-ha follows her opinions, and Soon-jae keeps the new changed plans from Mun-hee, so the trip becomes a disaster from the beginning. Meanwhile, Min-jeong is annoyed by her ex-boyfriend Seong-ho, who keeps on charging his cyber money with Min-jeong’s cell phone number. What’s more, even her students keep pulling pranks on her, making things even worse.