A shocking revelation emerges: Kozo (Koichi Satō) has a secret child. When Kurisu (Satoshi Tsumabuki) demands an explanation, Kozōo reveals that the woman involved is Mikiko Nakajo (Tomoko Nakajima), a former hostess who is now receiving medical care at a hospital in Maebashi.

Kurisu accompanies Kozo to visit Mikiko, where he learns from her that she and Kozo have a son—Koichi (Ren Meguro), a university student. After hearing her situation, Kurisu offers to support Mikiko on Kozo’s behalf, strengthening the bond of trust between him and Kozo. Meanwhile, Koichi himself has also become captivated by the world of racehorses.

At the same time, Kozo’s wife, Kyoko (Hitomi Kuroki), deeply unsettled by the news, takes decisive action of her own.

Amid these developments, Royal Hope—fresh off a victory in his debut race—and jockey Ryujiro (Mahiro Takasugi) build momentum, and Team Royal decides to enter the horse in the Japanese Derby…