Ji Wan and Tang Zhi were childhood sweethearts, but because Tang's mother was away at work, she took nine-year-old Tang Zhi abroad.
Ji Bang's father was an alcoholic, and his mother left when he was very young. Now Ji Bang's only thought is to go abroad.
He was not doing well, but Tangzhi promised him that he would come back, and he had to survive...
Purpose: redemption