Symbiosis

Ten thousand years ago, a powerful alien race called the Overseers took primitive humans and scattered them across the galaxy. Now, some of those humans have found their way home. Anna Lenai is a Justice Keeper, an officer of the law tasked with protecting her people from the most dangerous threats. While pursuing a felon into uncharted regions of space, she stumbles across Earth and finds the lost homeworld of her ancestors. Now she must survive in this new environment, learning the rules as she goes.