Mystery at Captain's Cove

Some people say that there is a curse on Captain Cove. Aunt Kay does not believe it, but teenaged detectives, Sara and Sam Harmon wonder why Aunt Kay receives threatening notes about danger at her Inn. And who is Mr. Henning really? Is he an artist as he claims to be or is he merely posing as an artist while he explores Captain's Cove for other reasons? What about the stories of tragedy happening to Captain Jensen's family after he stole an idol from a sacred burial cave and kept it at his house?