A man on a bike trip across the country gets killed in an accident. His lover, So-wol, moves to the island where he died and settles down. 3 years later, the couple’s close friend, Cheol, pays her a surprise visit. Staying at her place, he goes fishing or ventures out looking for a particular lighthouse. Slowly, without knowing, the seemingly mundane daily life of island mends their broken heart.
Jeongbong and Seong-hye run a guesthouse on Jeju Island. On one late summer day, Seong-hye’s ex-boyfriend and Jeongbong’s former female colleague visit the guesthouse, and the complicated romances of four individuals starts to unfold.
Everglow begins with the cute struggle of Kyung-hoon (Ji Hyun-woo), who visited Jeju to make a documentary about Jin-ok (Ko Doo-sim), a female diver. Kyunghoon’s work becomes a sincere mission for the souls buried in the deep sea and mountains.
A company hopes to open a spa hotel named after Ieodo, a mythical island inhabited by the souls of drowned sailors. During a study trip to the proposed location of the hotel, a journalist disappears under mysterious circumstances. One of the contractors goes to Ieodo's neighboring island, populated by widows of the dead sailors, to unravel the mystery.
Min-soo is about to get married when his fiancée suddenly admits that she is allergic to dogs. Now the guy's best friend, the golden retriever Rooney, needs a new family. With the help of his cousin and social media, Min-soo starts looking for a new home for Rooney.
When Seung-min was on his first year at the Academy of Architecture, he met Seo-yeon. She was a musician student, and Seung-min totally fell in love with her. Years have passed, and now he meets Seo-yeon again - she asks him to rebuild her father's old house.