During the first season of B: The Beginning, two men faced their pasts at great cost. Maverick detective Keith Flick battled his inner demons and ultimately uncovered the dark secrets behind the Kingdom of Cremona. Mutant prodigy Koku finally reunited with the most precious memory from his stolen childhood. Several months have passed since then, and the entire world seems to have forgotten the turmoil caused by those events. As Keith returns to the Royal Police to conduct his own investigation, Koku and Yuna try to enjoy an ordinary life in peace. But the consequences of the Jaula Blanca experiments are far from extinct, as Koku soon discovers when his supposedly dead lab mate Kirisame suddenly appears.