A meteor impacts the nation of Equestria, Planet Equis. Tranquility is quickly snuffed out when a poison begins to spread violently. The Princesses cannot combat this unknown threat, as no knowledge of it exists. Help comes from an unexpected source.
A half saiyan, half human little boy named Ken was subjugated to a lab for two years. When escaping he is transported to Equestria, where he's adopted, and gains a twin sister. Now Ken, and Kira, train to protect their new home, family, and friends.