The gang emerge from a cave to find themselves in an alternate reality… where Uncle Charlie never went missing! But it soon becomes clear that their presence is affecting the island and in order to save it, they must return to their own reality.

A tremor on Rock Island beach uncovers a mysterious portal to the lost civilisation of Atlantis! Unfortunately, Raquel finds the portal before our gang and matters are complicated by the arrival of a mysterious girl who asks out Ellis on a date.

Taylor and her friends must save the island from an ancient piece of glass that is wiping everyone's memories. But will they even be able to remember there is an island to save? And more importantly, will they remember Lila's birthday?