When Taylor discovers a bottle containing Uncle Charlie's old mobile phone, with a mysterious text message, the gang are lead to a deserted island with a threatening fog and a piratical past connected to Meesha's family.

Taylor meets a gold prospector with half of a ‘treasure' map of Rock Island. With Uncle Charlie's journal warning that Rock Island's gold must never be removed, Taylor's determined to protect it, but an aggressive swarm of bees disrupt her plans.