Falling in love at a young age is hard. Just ask Ahn Sumin and Kim Jongin – high school sweethearts turned worst enemies. After ending in bad terms, the two vowed never wanting to see each other again. Yet after six long years, the two unexpectedly meet when Sumin’s family goes on vacation at the Kim’s beach resort located in a tropical island. Sumin and Jongin don’t really hit it off at first, but under the magical spell of the romantic setting, sparks of love begin to fly again. It only takes a twist of fate to make them realize that maybe breaking up wasn’t the right choice.