On this very island named 비밀 which is also known as a Secret island that many would known that is a very dangerous island. Cho Jihyo, a scientist goes to the island to create a new world. She gave life to the robots; they’re exactly identical to people’s face. The scientist at there including Jihyo herself experiments to create more robots, giving them the knowledge, the abilities to do things that human would not be able to do. People go, and never come back. And there’s Cho Gyuri daughter of Cho Jihyo, the scientist daughter. She was determined to go find her mother with all might without seeking his father’s permission, which he had always said that the island is dangerous and SHE Cho Jihyo is dangerous. With the help of Jimin, the guy who owns a Jet boat that his father had given him as a birthday gift. She managed to arrive in 비밀 island, but she discovers a hidden truth. She had a twin named Cho Gina who was created by Jihyo that she never knew exist. Now that she found the truth, she continues to dig even deeper. She wants to know why her mom, Jihyo is doing this and not knowing the consequences. The journey continues to seek for the truth….