Oded Lotan, an Israeli-born film-maker living in Germany, dares to cope with one of the ‘holy cows’ concepts of the Jewish tradition – the circumcision. Lotan embarks on a journey to seek the historic origins of the custom, as well as his own family history. His investigations go in two directions – one is historical and demographic research which leads him to the discovery of the practice across the globe. More interesting, however are the discoveries he makes in Israel, questioning family, rabbis and mohels (the specialists who perform circumcision), people who oppose the tradition, and people who approach it in an almost mystical manner.