After a run-in with former teammate Rin ends with bitter feeIings and hurtfuI words, Haruka and his friends become determined to re-form the lwatobi Swim CIub. There's just one probIem—they're missing a much-needed fourth member! With their eyes set on the athIetic Rei, they've got to do what it takes to convince him to join so they can be in fighting form to face Rin's new school, Samezuka Academy.