When Blanche Porter’s pet, Mr. Cheeters, goes missing, she seeks the help of Nancy Drew and her friends. Oh, by the way, Mr. Cheeters is a chimpanzee wearing a diamond necklace. Despite the town thinking Ms. Porter is an oddball, Nancy is taken with the love she has for her pet and agrees to search for Mr. Cheeters.

When Blanche’s brother, Lawrence comes to town to calm his sister, Nancy believes he’s there under false pretenses. Can she find Mr. Cheeters before it’s too late? ( )