In December 2017, the shocking discovery of multi-billionaire couple Barry and Honey Sherman, found in a gruesome position in their Toronto mansion, sent shockwaves around the world. Despite extensive media coverage and public interest, five years later, the case remains unsolved with no suspects identified. The four-part documentary, Billionaire Murders, follows investigative journalist Kevin Donovan as he seeks to unravel the mystery behind their deaths. Through exclusive interviews with those close to the Shermans and insights from fellow reporters, Donovan explores the couple's lives and the myriad of conspiracy theories surrounding their tragic fate.