Nancy and her friends form a singing group called the Spy Girlz and enter a contest to win tickets to an Eric Stanley concert, but they find themselves in the middle of a mystery when their borrowed sunglasses, that once belonged to the singer, disappear. Nancy and her friends form a singing group called the Spy Girlz and enter a contest to win tickets to an Eric Stanley concert, but they find themselves in the middle of a mystery when their borrowed sunglasses, that once belonged to the singer, disappear.