At first, it seemed like the nerd's revenge. When Trish Gambone shows up at Mary DiNunzio's office, the former wallflower, now a successful businesswoman, feels that she has the right to gloat a little at the expense of her old high school rival. After all, things haven't been going well lately for cynical Trish: Apparently, she's sharing a bed with an abusive, gun-toting, crack-selling mobster from South Philly. Before long though, Mary's mild vengeful pride takes a backseat to guilty worry when Trish goes missing. Then emotions escalate further when a mutilated body is found in an alley. Lisa Scottoline at the top of her whodunit game.