Kang-Joon a 25-year-old single parent high school dropout suffers from depression, anxiety, and ADHD. After witnessing his older twin brother being kidnapped and not being able to save him, Kang-Joon relieves his regrets and pain through drugs, alcohol, and sex. 11 years his brothers’ case has been cold no new evidence nor leads. The only thing keeping him functioning is his 8-year-old son Wonho and maybe a new love interests that sparks in his life. He soon discovers the person that has captured his heart also has ties with his brother.