Set in the world of competition swimming. Woo-Sang (Lee Jong-Suk) is a national swimmer. He pursues the number one spot. Won-Il (Seo In-Guk) is gifted swimmer, but stopped participating in the sport. He then makes a come back.
Filming began May 19, 2013 and finishes in mid-August, 2013. For the overseas training scenes, movie was filmed on location in Davao City, Philippines in August, 2013.