After a harrowing summer camp, Arlo Finch is back in Pine Mountain, Colorado, preparing to face a new school, new threats, and two new Rangers in Blue Patrol. Arlo is about to undertake his most dangerous journey yet—all the way to China to try to bring his father home. But when the mysterious Eldritch reveal their true agenda, Arlo must make an impossible choice: save his friends and family, or save the Long Woods. Both worlds will never be the same.