This following page contains major spoilers about Texas Chainsaw 3D. Read at your own risk. 

Heather Miller is the Final girl of Texas Chainsaw 3D. She travels to Texas to collect an inheritance, unaware that the chainsaw-wielding Leatherface is part of the "reward". Leatherface kills all of Heather's friends, until she finds out that Leatherface is her cousin. Upon this revelation, she joins forces with him and becomes evil, an unexpected twist for the final girl that has never been seen before.