How would you act if part of your personality was stolen with a brain-sucking machine?

Lester Smythe has a black heart. He’s invented a dangerous brain-sucking machine that removes the goodness from its victims, and he intends to use it to rid the world of all human kindness. But Lester didn’t count on thirteen-year-old Callum McCullock and his two best friends, Sophie and Jinx. The trio vow to destroy the brain sucker. And nothing will stop them.