The Search for Instagram's Worst Con Artist tells the inside story of Belle Gibson, the 21-year-old social influencer who claimed she cured her terminal cancer through wellness and healthy eating. Her miraculous story brought her fame and money, with a successful app, a book deal and countless television appearances. But when journalists investigated, they discovered something shocking: none of her story was true – she never had cancer. She had misled her millions of followers – and for some there were devastating consequences.

With access to friends and family who speak on the record for the first time, this series discovers the truth about Belle Gibson. Was she a manipulative, compulsive liar or a damaged young woman exploited by big brands for their own ends?