Annabel is dead. And she's not happy about it. Despite having strived to be 'lighter than air' back when she was alive, the consequences of that yearning haven't quite sunk in yet.
Julia Jacobs is fat. Which Annabel immediately notices when she's assigned as Julia's ghostly helper (don't even think about calling her a guardian angel). And as her helper, Julia's problem seems pretty obvious to Annabel. Fat = problem = unhappy. Sorted.
The only trouble is that whatever is causing Julia to overeat is hidden deep within her. Annabel will have to get to know Julia to uncover this secret and 'fix' her. Annabel can become the voice of reason, Julia's source of strength.
Except... all this time spent in someone's head has got Annabel thinking. Not just about food, but about her family too. And that maybe happiness can mean more than eradicating all the flesh from your bones.