Ring Toss Stickin' Around : Season 2 Episode 18

Stacy tries to impress the gang by claiming she is really a princess from a now defunct but real-sounding foreign land. However when she loses the diamond ring that she "borrowed" from her mother as part of her charade, she must assume the identity of Stacy Smart, Ace Detective, and solve the Mystery of the Missing Ring before her Mom finds out it's missing and grounds her for life.