In the near future, violence is controlled in societies avoiding wars. Killing is allowed to violent individuals in a game called Big Hunt where the participants are alternatively Hunter or Victim. The winner of each round is awarded with a prize and the survivor after ten rounds, wins one million dollar award (in 1965). When the American huntress Caroline Meredith completes her ninth round, she comes to Rome to kill her tenth victim. She negotiates with the sponsor Ming Tea Company to kill his victim in front of the cameras. The cynical Marcello Poletti is her target and has just succeeded in his marriage annulment with Lidia but has not disclosed to his lover Olga. Marcello suspects that Caroline is his hunter, but is not sure; further he falls in love with her and he is reluctant to kill her.
—Claudio Carvalho, Rio de Janeiro, Brazil