Five Elements: The crimson serpent

"Gabe and his friends thought they had finally discovered a way to destroy the shadow dimension of Arcadia forever. But they were tricked--and instead of saving San Francisco, they've merged it and Arcadia into one nightmarish reality. To undo their mistake, they'll have to risk the ultimate sacrifice in a high-stakes battle that will unite all five elements . . . one last time"--Provided by publisher.