Two aliens have wandered Earth for centuries. The Changeling has survived by adapting the forms of many different organisms. The Chameleon destroys anything or anyone that threatens it.

Now, a sunken relic that holds the key to their origins calls to them to take them home—but the Chameleon has decided there’s only room for one.

Thousands of years after an entire colony mysteriously disappears, antiquities dealer Alex Benedict comes into possession of a cup that seems to be from the Seeker, one of the colony’s ships. Investigating the provenance of the cup, Alex and his assistant Chase follow a deadly trail to the Seeker-strangely adrift in a system barren of habitable worlds. But their discovery raises more questions than it answers, drawing Alex and Chase into the very heart of danger.