Oxford. February, 1966. Young ENDEAVOUR MORSE is hurting – professionally, emotionally, even physically. His isolation has magnified in the weeks since the shocking events of the Series 1 finale. But other forces on the horizon are conspiring to set him on a new and treacherous path. A dark undercurrent lurks beneath the cultural hedonism and Rule Britannia oompah-pah of the mid-1960s. One of permissiveness, and sin, and encroaching incivility.