Abigail has been invited on an all expenses paid trip on an island off Tasmania’s coast. There she joins a group of strangers to discover ‘the secret’. All any of them know is that for most of their lives they have each received chapters of a mysterious book starting when they were fifteen. This mysterious Guidebook is more than just a curiosity to Abigail. The first chapter arrived the day before her brother went missing and her whole life she has wondered at the connection…

Gravity is the Thing travels between Abigail’s life in Sydney; running a cafe and raising her boy Oscar , and moments in her past that unravel to show us the story of how she came to search for the Guidebook’s secret.