The Prodigy crew and Chakotay reunite with Voyager, bringing the timelost Protostar with them. But the past catches up to them when Ilthuran delivers a dire warning — Asencia is coming.

To prevent a war between the Federation and Solum, Gwyn leads the Protostar crew on a mission to rescue Ilthuran. But surprising discoveries force Gwyn to make hard choices which have dire consequences for everyone.