Front cover tag line: Life isn't always smooth sailing. Back cover tag line: Things just aren't adding up anymore. Charlie Abbott's life with her dad, a once brilliant mathematician, isn't easy. Her father struggles with mood swings and depression, and Charlie feels like it's her responsibility to make sure he gets out of bed and takes his medication every day. But lately she's been distracted by her crush, Lachlan, and she doesn't realize how bad her father's mental health is getting. When he disappears, leaving only a note behind, Charlie must retrace her dad's steps and find him before it's too late.
