Danny's parents are storm chasers—which sounds exciting unless you're the son who has to wait behind at home. And one night, Danny's parents don't come back. Stranger still, the sycamore tree in Danny's yard seems to have been struck by lightning, and when he picks up a fragment of wood, he can hear voices...including that of next door's cat, Mitzy. The stick is a shard of lightning that gives its bearer unnerving powers and it is very valuable. So valuable that it attracts the attention of a Sammael, an ancient figure of darkness and a buyer of souls. And he will do anything to get his hands on it...