請來藝人與素人，通過簡單測試、相處實況、促膝談心，嘉賓分享自己對友誼的看法，並找來好友，分享他們之間的共同經歷和回憶，透過簡單測試，考驗二人合拍度、忠誠度和相處之道。

As Hong Kong's foremost filmmaker, Johnnie To himself becomes the protagonist of this painstaking documentary exploring him and his Boundless world of film. A film student from Beijing and avid Johnnie To fan, Ferris Lin boldly approached To with a proposal to document the master director for his graduation thesis. To agreed immediately and Lin's camera closely followed him for over two years, capturing the man behind the movies and the myths. The result is Boundless, a candid profile of one of Hong Kong's greatest directors and a heartfelt love letter to Hong Kong cinema.