The Strange Case of Chase and Spike

Strange things are happening around Mission Creek. Adam's friend Chase has been acting really weird. Not to mention the new kid in town, Spike, who has been causing a lot of trouble. But what does Spike have to do with Chase? And why is Chase so concerned about his own "disappearance"? (AU and OOC. Based on "Strange Case of Dr. Jekyll and Mr. Hyde" by Robert Louis Stevenson.)