Free! starts with four boys—Haruka, Makoto, Nagisa and Rin—before they graduate from elementary school. They all participated in a swimming tournament and won, though they parted ways. Years later, Haruka and Makoto reunite with Nagisa when Nagisa enrolls into high school a year after Haruka and Makoto. Nagisa suggests creating a swimming club and using the run-down outdoor pool. Haruka, Makoto, and Nagisa, and later on, Rei, create the Iwatobi High School Swimming Club and work together to make the club a success.