In the first episode, a timid lion cub named Kio is born to Summer, the queen of a powerful pride. When a hunt ends in tragedy, Kio gets his first glimpse at how unpredictable life on the savannah can be. He slowly grows braver until a solo adventure brings him face to face with the pride's mortal enemy: the buffalo.

Kio reunites with his brothers but faces a tragedy that tests his courage.