Evidence of the lost city of Atlantis has been found in tiny Prince Edward Island, of all places! Amateur detectives Hannah and her younger sister Emily are intent upon unravelling the historical puzzle that has stumped experts for millennia: Where exactly is Atlantis hidden? Along with friends Jack and Lucy, the four investigators help a team of professional archaeologists dig for clues to unearth the mystery behind Atlantis' sudden disappearance 9000 years ago.The sleuths soon discover a dazzling artifact buried deep in the island's famous red soil, and expert analysis reveals the object originated in Atlantis! Just as their dreams of fame begin to blossom, they are crushed as heartless thieves threaten to destroy the evidence of the lost city. It's up to Hannah and her gang to solve the mystery with their usual flair.