In 1973, Mexican anthropologist Santiago Genovés wants to conduct a study on the origins of violence and the dynamics of sexual attraction in a closed environment. To do this, he recruits 10 men and women of different religions and nationalities in an effect to maximize friction, on a 101-day adventure at sea as they cross the Atlantic Ocean on a specially designed raft that he names the Acali. But on the journey from the Canary Islands to Cazumel in Mexico, nothing goes as planned. Instead of fighting or having sex, the group becomes mutinous, slowly turning against Santiago, even plotting to kill him at one point. Today, more than 40 years later, the surviving participants — six women and a man—reunite in a studio where a replica of the Acali has been built, to discuss the controversial scientific adventure.