No sooner has Sarah caught her breath after a stealthy escape from DYAD and the ruthless clone Rachel (Maslany), she is called upon to face the crazed, captive Castor clone, Rudy (Millen). But it is the discovery of Helena’s disap­pearance that spurs Sarah into action, rallying her sisters in the quest to reunite their clone family, and find peace once and for all.
Their greatest threat is a band of highly trained soldiers – identical brothers dubbed Project Castor. Unlike the sisterhood, Mark, Rudy, Seth, Miller and others (Millen) grew up together, fully aware of who and what they are. Developed by the military, this wolf pack was raised as regimented clones – singular in thought, movement and allegiance. Hell-bent on kicking up dirt, they’re dispatched to tackle their mission from all sides. But differences in approach betray cracks in their armor, and may be the very thing the sisters need to escape their clutches.
The hits keep coming for the girls but their commitment to this new family is as important as ever. No clone can do it alone, and Sarah must align with unlikely bedfellows in order to take on what is yet to come… and hopefully, discover the truth – her truth – along the way. How far are they willing to go to save each other and protect their families?