考入大学的遥。在游泳部，为了新人赛正在开始练习。这时，遥与中学时期的队友旭重逢。和一起进京的真琴一起在咖啡厅里开始诉说当时的回忆。话题是另一个中学时期的队友郁弥。

现在生活在澳大利亚的凛，每天和来自世界各地的游泳运动员一起努力训练。然而，一个日本人出现在他的队伍训练的地方，向他的队友们发起挑战，并逐一击败他们。当这个新来的人说出自己的身份时，连凛都感到惊讶......

The Iwatobi High School Swim Club is participating in a joint training camp with the Samezuka Academy and Soufuukan High School teams. Sousuke is also participating as an alumnus. In the midst of the excitement, Rei and Nagisa notice that something is odd about Romio's swimming. Then Shizuru tells them the story of what happened to Romio in middle school...

With the college championships approaching, all the swimmers are training hard on their own in addition to their official club practices. Haruka is also undergoing some extra training, with coaching from the mysterious man they've been seeing around campus. Makoto is concerned about the arrangement, but Haruka assures him that he asked for the help himself

Haruka's next race is the All-Japan Invitational, which determines who will represent Japan at the global level. To prepare for this important tournament, Haruka is invited to a special training camp.

Makoto meets up with the members of the Iwatobi Swim Club who are in Tokyo for the nationals. Meanwhile, Haru continues his training.