Quan, a gardener with an outstanding talent for "killing girls", suddenly one day had to shoulder the "falling debt" from his ex-girlfriend. With the help of Tam Manh's "three effective seven parts, seven troubles", Quan gradually lost all hope of finding the baby's mother and gradually became the perfect father in Baby Rabbit's eyes. The colorful lives and laughter of father and son are put to great test when the mother that Baby Rabbit has been waiting for day and night finally appears...

The story tells of Đình Phong and his friends: Ngo Kien Ha, Pham Quynh Bang, Sky - a funny Korean girl, and manager Lam - a greedy guy. The screenplay is based on the book Bắt đầu từ một kết thúc, an autobiography about the life of the ill-fated singer Wanbi Tuấn Anh.

Good Boy Gone Best centers on Mr. Phát, Mrs. Diệp, and their only son, Phú Quý. Determined to raise their child according to their own ideals, Phát and Diệp create a deliberately confusing life where wealth and poverty, truth and deception, constantly blur together. But as Phú Quý grows up and begins making choices that defy his parents’ expectations, a series of hilarious mishaps unfolds—bringing long-buried secrets to light. Beneath its comedic premise, Good Boy Gone Best is a heartfelt story about family bonds, generational differences, and the journey of parents and children learning to listen to and truly understand one another.