Aware that the evil smuggler, Pam, is closing in on their location, the bears of Bearhaven are moving to a new location--but the attack comes too soon, and Spencer Plain and his bear friends, Aldo and Kate, are cut off from Spencer's parents and the other bears, and in serious need of a plan to rescue both themselves and the captive bears that are controlled by Pam.

Spencer Plain's parents are prisoners of Pam, who runs an illegal ring of rare animal trading, and they are being held at the Hidden Rock Zoo, target of the next rescue mission the bears of Bearhaven are planning--but when the rescue starts to go wrong, and he and Aldo are cut off from the team, it will take some quick thinking and serious stealth to save the mission.