Lines of Neutrality is a window into the lives of two modern-day assassins - Raven Yin and Christian Delacroix. Unbeknownst to either of them, they are both hired to kill the same mark and coincidentally choose the exact same night and time to strike. This begins a chain of events that brings Raven and Christian together to fight a war far larger and more complex than either of them could have imagined. It is a war being waged against secret societies whose agendas are more enigmatic than their rumored existence.

Their personalities and methods are fundamentally different, yet each of them discovers more about themselves by studying the other. Despite secret societies, internal betrayal, stolen memories and personal battles, Raven and Christian defy the odds to show that the Society of Assassins is nobody's pawn.