The Dead Ex

Vicki's husband David once promised to love her in sickness and in health. But after a brutal attack left her suffering with epilepsy, he ran away with his mistress. So when Vicki gets a call one day to say that he's missing, her first thought is 'good riddance'. But then the police find evidence suggesting that David is dead. And they think Vicki had something to do with it. What really happened on the night of David's disappearance? And how can Vicki prove her innocence, when she's not even sure of it herself?