The strength of the story lies in the familial and pseudo-familial relationships, especially the genuineness of the father-daughter relationship. Here's what I didn't like about the story. Yong Goo's story feels totally unrealistic at times, such that sometimes I thought "really?!", when the ones who are supposed to enforce and uphold justice don't seem to give a damn about the injustice of his case. At times it felt that the writer was trying to wring your heart of as many tears as possible. What an excellent cast. So what if the only name you recognized was Park Shin Hye? In fact, she doesn't even play the most important part of this movie. Kal So Won is a child star in the making - at times she is strong and cheerful, other times she breaks your heart with her love for her father. Ryu Seung Ryong makes a departure from playing the gruff, stoic characters, to take on a challenging role - like . Not only did he manage not to be a parody of a mentally retarded man, he infused lots of heart and love into the character. Imagine throwing together a bunch of actors usually cast as villains, but put them in a comedy. Yong Goo's cellmates are just that. You probably recognize them from other shows as villains. In this movie, they play hardened prison birds, who are initially dumbfounded by Yong Goo and try to subordinate him to the internal prison hierarchy, but are eventually won over by his innocence, sincerity and fatherly love. They bring the most laughs to this movie. This movie has no deep message to preach, or lesson to teach, but gives lots of entertainment value by delivering many laughs and cries.