They vowed to love each other forever...When a dead body is discovered outside the Tall Pines reception hall, Detective Grace Sheppard is called to the scene. Searching for the truth among deceitful suspects and within herself, Grace struggles when her professional relationship becomes muddled with attraction. They swore nothing would come between them...As Grace races to find a killer, a personal vendetta is formed when her sister, Madigan Knox, becomes obsessed with a traumatic event from her past. Madigan's hunt leads her closer to the truth than she has ever been and further away from the person who loves her the most. But promises are broken, and the secrets they keep threaten their lives. Both sisters are willing to find their culprits at any cost, but will the price of secrets and revenge be their demise?