On Taylor's 14th birthday she receives a locked chest from her Uncle Charlie, who has been missing for five years! When the chest starts ticking, Taylor and her friends realise they must find a way to open it, or the contents will be destroyed.

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 encounters an old friend of Uncle Charlie's whose been keeping himself young by drinking from a fountain of youth! Then when Meesha accidentally drinks some of the water and becomes a baby, Taylor, and the others must find the antidote!