Charlotte Brown's body was found on December 8, 2015. An online date ended in horrific tragedy and sparked an international manhunt. 28-year-old Jack Shepherd met 24-year-old Charlotte Brown for the first and only time on December 8, 2015. After a night out, Jack offered her a ride on the Thames in his speedboat. Hours later, Charlotte's body was lifted out of the water. An autopsy ruled that she died from immersion in cold water. Jack Shepherd was unharmed. With unique access to Charlotte's family and the police investigation, this series tells the story of tragedy and the fight for justice.