The Single Twin

Abe Allard and C.S. Duffy are not handsome, wise, or tough. They're not successful. They're not good at much, but they do know how to solve a mystery. 
A woman digging into the adoption of her long-lost twin brother starts getting close to a long-buried secret which riles up those who would rather it stayed hidden. Fearing for her safety, she asks Abe and Duff to find out what really happened that night, and why would someone be willing to keep this adoption from being brought to light.