The exciting crossover between The Next Generation and Deep Space Nine continues! The search for the missing Ezri Dax gets some unexpected assistance from the crew of the Enterprise-E. But that aid may be too little too late, since Ezris kidnapping proves to be only one part of a worldwide conspiracy of genocide against all joined Trill. Meanwhile, Beverly Crusher, unaware of the plot, brings the Odan symbiont to the caves of Makala, which should be a healing place but, in fact, might be the most dangerous spot on the Trill planet.