A war leaves the Stony Isle in turmoil. Two young dogs, Saphira and Corin, make the choice to serve, not in the military, but as employees at a top-secret research facility, desperately looking for a weapon that can stop the fighting once and for all. Though their work is fulfilling, the friendships they make are what carry them through such a difficult time.
As the war drags on, tensions rise within the laboratory. Saphira finds herself working on projects that terrify her. Corin struggles to keep up with the amount of work expected from him. Leadership is falling apart on the inside.
Then the compound itself turns to fire and rubble, splitting the siblings apart from their friends and from each other. Not everyone walks away unscathed, and those that do must learn to navigate their new world, to heal, and to find peace with themselves and with each other.