Lexi and Lottie are fed up with being mistaken for each other and with being referred to collectively as 'the twins', so they decide to change their appearance so people can tell them apart and they stop working as a duo. When two kids' pets go missing, Lexi and Lottie each take a case and investigate it on their own and, as a result, vital clues get overlooked. However, when their pet chameleon, Picasso, is stolen, the twins realise they have to join forces again to solve the three crimes.