Cass finds herself alone and disoriented in a dream-like world, while back at home she is in the hospital in a coma with Max-Ernest desperately searching for a way to awaken her.

When a mummy disappears from the local history museum while Cass and her friends Max-Ernest and Yo-Yoji are there, they try to solve the case in order to clear their names and, they hope, discover the Secret they have been seeking.

Tao is an outcast. Unlike the great hunters of his clan, Tao does not want to kill the wild bears or woolly mammoths of the hunt. Instead he wants only to paint them. But only Chosen Ones can be cave painters. What's more, Volt, the clan leader, violently despises Tao. And when the other clan members discover Tao's secret talent, they cast him out into the wilderness alone. There, he befriends a wild wolf dog named Ram, and the mysterious Graybeard,...