 When Eames, a warlock who accumulated many powers including self-cloning and deflection of powers, kills another witch nearby, the elders send a colleague to help Leo, Nathalie, who is a real stickler for rules, but the sisters grin and bare it because her recommendation is required to end Piper s trial period with Leo, so they take her by-the-book orders in stead of Leo s guidance by suggestion and even military-style training and dress-code. But the planning doesn t prevent Eames  plan to kill a dark lighter for his cross-bow so all he needs is a white lighters power and he can commit mass-murder on their protectors and next on all witches...