They find the town silent, apparently abandoned. Then they find the first body, strangely swollen and still warm. One hundred fifty are dead, three hundred fifty are missing. But the terror has only begun in the tiny mountain town of Snowfield, California. At first they think it is the work of a maniac. Or terrorists. Or toxic contamination. Or a bizarre new disease. But then they uncover the truth. And they see it in the flesh. It is worse than anything they ever dared to imagine ....