Taylor and the gang discover a symbol that leads them on a treasure hunt all over Rock Island, resulting in an incredible discovery! Along the way they must protect their precious cake cargo – and deal with a menacing Raquel from the South Section.

The gang comes across a glamorous girl with a vintage spy camera and no memory. Is she a spy from the 1950s? With Raquel sniffing around, the team tries to help the mysterious girl remember who she is while uncovering what Raquel wants.