The Alpha and The Omega

Alphas, Betas And Omegas, they are all part of the world, they are everywhere. Alphas, they are the strongest beings in the world, but when they find their mate, they become the kindest and happiest, unless someone harms their mate. Betas, they are the secondary beings of the world, they are strong, but not the strongest, but they can protect themselves against an Alpha if needed, but they know not to pick fights with them. Lastly, you have the Omegas, Omegas are classed as the lowest-ranked being in the world, smaller than an ant. Omegas aren't strong, they are weak and fragile, they need Alphas to protect them when they are needed, they need comfort when said, they need a mate for their first heat, and poor Nathanial Louis Davis, he's one of these Omegas.

What happens when the weakest and the strongest are joined together for an assignment, and what secrets are found out?
(Complete!)