In the third and final installment of the Worlds Apart Series, titled 'Worlds Unite: The Mafia Boss,' Tennly and Conner once again confront challenges in their relationship. These trials lead to loss, struggles, and decisions that create further complications. Conner uncovers new relationships he thought were long lost, which help him navigate through one of the darkest periods of his life. Meanwhile, Tennly is determined to use her power, despite the risk to her own life, to protect her loved ones.