A cure for Alzheimer's would be worth billions. And well worth killing for. Simon Ayot is an Englishman working for Revere Partners, one of Boston's top venture-capital firms. The firm's star investment, worth millions of dollars for each of its partners, is BioOne, which is working on a cure for the disease. Frank, one of Simon's bosses and his father-in-law, is found murdered at his summer house in the marshes, and Simon is in the frame. To stay alive, and to save his marriage, Simon must figure out who killed Frank. And who will be the next to die.