Jager's new squad of Defenders has completed training, but the spoiled princess who has grated on his nerves since her first day of training is called back to Hemera for a yearly celebration. When Princess Katrina doesn't show up, Jager must find her and drag her home, where he wishes she would stay.

Katrina is a Defender, not a princess. And there is no way she wants to return to a planet she hates for some stupid ceremony. Not when she could be out killing Erebus with her squad.

But when a new enemy threatens both their lives, they must work together to survive.