&Zack and Mia;, Adapted from A.J. Bates' novel, it tells the story of two teenagers fighting cancer in the same hospital. In the real world, Zack and Mia have almost nothing in common, but in the hospital, they are the only two teenagers in the ward and they have established an unbreakable bond. If cancer is a variable that changes everything, then the only constant is their ongoing need for each other.