Lee Doo-sam is a small time smuggler in Busan, Korea. One day, he helps the mob smuggle meth by chance and finds himself falling into the dark crime world. Being quick-witted and full of ambition, he eventually overtakes the underworld and starts to lead a double life: a good community leader during day but during the night, an infamous drug lord who rules an empire.

“I’ll blow up Mapo Bridge.” An anonymous call comes into a radio station one day. When it turns out to be legitimate, a terrorist’s threats end up getting broadcast live throughout the country.

Dae-su, once a promising taekwondo athlete with ‘incompetent swing kick’ and Mira, who dreamt of becoming an idol, unexpectedly became teenage parents at the age of 17. Now they’re 33 and have a 16-year old son Ahreum. Due to an extremely rare genetic disorder called progeria, Ahreum ages exponentially faster than normal people. Even though he’s just a teenager, his body is that of an 80-year old man’s. Despite all the negativity and hardships in their lives, this tight-knit young family carries on, taking one day at a time. One day, Ahreum’s story is broadcasted nationally via network TV program. He is suddenly thrown into the spotlight, and his normally dull days are now filled with moments of happiness, joy and sorrow?