Donggu, a despicable thug, has been living a hopeless and tragic life. One day, he unexpectedly obtained a bank passbook containing a huge amount of funds of up to 1 billion Korean won. He went to Busan to try to obtain the PIN number for his bank account. When Dongjiu met an eight year old boy named Boji (played by Jo Won bin) in Busan, Boji believed that Dongjiu was his father, and the boy's mother Ae sook (played by Hong Ah reum) began their story.
