During the Japanese colonial era, roughly 400 Korean people, who were forced onto Battleship Island ("Hashima Island") to mine for coal, attempt to escape.

A love story centered on ex-boxer Chul-min (So Ji-sub) and telemarketer Jung-hwa (Han Hyo-joo). He has closed his heart to the world and she remains spirited despite slowly losing her vision. Their fate intertwines when their past are revealed in their blooming relationship. Written by Anonymous

Ji Hyeong-do is an assassin for a company that masquerades as a metal trading firm. One day, he takes on a job partnering with a young man (Ra Hun) whom he is to kill afterwards. Ra Hun asks a favor of Hyeong-do, which is to give money to his family. Hyeong-do visits Ra Hun's home where he meets Ra Hun's mother, Yu Mi-Yeon, a former singer whom Hyeong-do admired in the past. Guilt, an unknown feeling up to this point for Hyeong-do, begins to take him over. When Hyeong-do's company realizes that he hasn't taken out Ra Hun as planned, Hyeong-do quickly becomes targeted. Written by luraz isketambola

Set in 18th century Korea, long-ruling King Yeongjo's struggle with his son, Sado, sees the king take extreme measures in order to deal with his heir.

Along with his young son, Ji-ho, Woo-jin misses his wife Soo-a, who died after promising to return a year later with the rainy season. Miraculously, they reunite with Soo-a when the rainy season comes around, but she has no memory of her husband and son whom she dearly loved.

Go Ae Rin is a single mother who after unexpectedly losing her husband, gets involved in a spy war. She lives in the apartment in front of Kim Bon. Kim Bon, who's code name is Terius, is a legendary black ops agent for the National Intelligence Service (NIS) who has gone into hiding after disappearing without a trace. 3 years ago in a failed secret operation, he lost the woman he loved. Since then, Kim Bon has hid away in his apartment, next to Go Ae Rin, isolated from the world around him and living in secrecy, trying to uncover the mystery behind what happened back then. When a mysterious incident arises in which Go Ae Rin's husband dies, they both team up to uncover a huge conspiracy which Go Ae Rin's husband had become involved in. Joining them is Jin Young Tae, a former con man who may hold the key to what Go Ae Rin and Kim Bon are searching for, and Yoo Ji Yeon, a fellow NIS agent who appears cold and unfeeling on the outside but harbors feelings towards Kim Bon, who she is kind...