Society to the Immortal

Each second a person lives, they grow closer to our mass inevitability. Our lives temporary amongst a timeline that will extend far past our consciousness.
To lose this fact, unable to face this fate, does it make one any less human?
The Society of the Immortal, souls trapped outside the blessing of age, are beyond death. This collection of people are unable to die of any accord, and this is a fact for the birth of many Immortals. For these few, their certainty was their immunity to death. In ancient times the discovered immortals were often seen to be gods, but with the new ages that pass the Society finds secrecy to be their best shelter.

For centuries the society is successful in this goal, hiding from the world in a rotation of identities over many a location. But upon the death of one of their own, their one unique certainty is yanked from beneath their feet. Eliza White, the youngest of the society, is shaken by the death of the one person she thought she'd be able to spend eternity with. While the society scatters for fear of the incoming threat, Eliza stands her ground to find and take down the people who took away her only friend. Defying her nature she must ally herself with someone unlikely to find her goal, while at the same time the organizations guilty of murder works to find and capture the society's members.