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Jin Wei brings his wife Jenny Jones and four-year-old son Charlie King to his hometown, Beijing, where he had been away for 10 years, and returning to his courtyard. Jin Defang was very happy for the eldest son's family to return to work in China. Whenever he met people, he said that the elder was capable, but his happiness inadvertently caused the second son, third son, and younger daughter to feel jealous.

Woo Sang is a national swimmer who's always pursuing the number one spot. Won Il is a swimming prodigy who stopped participating in the sport, and now wants to make a comeback. Not only do they become rivals, but they also fall for the same girl, Jung Eun, an aspiring musician who is their childhood friend. The three lifelong friends suddenly find themselves having to juggle love, friendship, and competition, as they undergo the rite of passage of growing up.