It was someone's birthday, and they had very kindly smuggled some heroin into jail, and he was very generously sharing it out with all of his colleagues.
누군가의 생일이었는데, 사람들이 참 친절하게도 소량의 헤로인을 감옥으로 비밀리에 들여왔던 것이었죠. 생일을 맞은 자는 아주 너그럽게 그의 동료 죄수들과 헤로인을 나누기로 했습니다.