Zoé takes up boxing ... an unusual role for a young woman ... under the patronage of Albert, a peronable businessman. But one night he absconds with the money, including her winnings. She determines to get her revenge and she disguises herself as a man, and finds him in a travesty bar, where she stabs him to death. The story is told in semi-documentary style, with flashbacks and pieces to camera by witnesses and friends and relatives, and her legal adviser.