Minha Irmã Quer Meu Cérebro Aberto!

Her fiancé vanishes. Her stepsister locks her in a basement, stealing her genius for three years. When he returns, they tell him she's dead, a suicide, her body donated to science. But the truth is a live craniotomy. As the drill descends, he smashes through the doors. Can he stop the blade before it proves she was alive all along?