Changing sex. Not simple, not well understood, not consistently regulated, but here to stay and getting complicated. The Fifth Estate follows 17-year-old Adina Scheim from Toronto, who is becoming a boy named Ayden. Ayden is willing to go to great lengths to alter her female body to correspond with her male self-image. And Ayden is not alone. One Canadian clinic is carrying out 250 sex reassignments per year. Women and men of all ages believe that identity is not as simple as what kind of body parts they happen to be born with. In order to find their true identity, they’re prepared to undergo major surgery, which can cost tens of thousands of dollars and is most often irreversible. Ayden’s parents and friends, health and gender experts, and several individuals who chose sex re-assignment offer insight into a charged and complex issue.