The second in a major new nine-part conspiracy thriller, starring Romola Garai. Written by Matthew Broughton. Florian Chauvin was flying to Wales to tell his daughter Helen something important, but his plane fell out of the sky. Now Helen wants to know why. In the aftermath of the crash, Helen and Freddy investigate why one of the passengers doesn't seem to have a heart. What was Florian coming to tell Helen? Who was in his party of five? And how is the shadowy medical corporation, Mayflower, implicated in the plane crash? Tracks: A story in nine parts about life, death and the human brain. Original music by Stu Barker Directed in Wales by James Robinson.