Two children holidaying at the Cape Otway Lighthouse Station in Victoria Australia meet the ghost of an old Scottish sea captain who roams the world helping the 'spirits' of lighthouses and helping 'conserve' the towers. Captain Angus befriends the children and takes them on virtual reality trips via a magic time tunnel. Together, they experience sailing on an old sailor's vessel, see a shipwreck rescue, witness the tower being built, and even meet one of their own ancestors!