In this sequel to Eric Walters's bestselling Tiger by the Tail, Sarah and Nicholas Fraser set off to spend a week at zoo camp, compliments of their absent father. Initially reluctant to leave Mr. McCurdy and his menagerie of exotic animals behind, they resolve to make the best of it when they discover that this is their mother's big chance for a vacation of her own. Once they arrive at the airport, however, they quickly learn that the camp is not what it seemed. They sleep in a run-down cabin with no running water; Vladimir, the gruff zookeeper, is more at home with his animals than with other people; and the owners are more interested in making a profit than in the well-being of the animals.

When Sarah overhears a conversation late one night and learns of the sinister plans for Kushna the tiger, she and Nicholas once again must spring into action to save an endangered animal. They need help to do it, and that means turning to the only person they know who can-Mr. McCurdy!