主人翁龍馬在日本贏得全國大賽決勝戰後毅然移地至美國進行自我訓練;剛到洛杉磯,龍馬就巧遇被街頭份子騷擾的同學龍崎櫻乃,為了拯救櫻乃,龍馬和混混們展開激烈的網球大戰,然而,在奮戰之中,龍馬和櫻乃卻意外被捲入時空裂縫之中,兩人穿越回到幾十年前,並碰上龍馬的父親—被眾人稱為「武士」、前途一片光明卻在職業巔峰時期火速退役的越前南次郎;面對不同時空的父親,龍馬下定決心揭開當年父親退役背後的謎團,一場追逐真相的冒險旅程即將展開!本故事為原創新作,結合奇幻冒險、運動競賽、唱跳歌舞,開創「網球王子」新篇章!
Provoked by his father well known as Samurai Nanjirou, a legendary former professional tennis player, Ryoma is determined to train himself in US after winning a championship in Japan. He runs into his classmate Sakuno, getting in trouble with street gangs, and accepts a tennis match against the villains to save her. Through the intense tennis battle, the shock of two ramming tennis balls makes stream of time leaped somehow. Ryoma and Sakuno find themselves transported back to the past decades ago when Ryoma’s father challenged his last match at a championship in US.