Back from their honeymoon, Senator Nick Cappuano and D.C. Police Lieutenant Sam Holland are ready for some normalcy after the whirlwind of their wedding, but someone has other plans for them. When Sam discovers wedding cards containing thinly veiled death threats, she's not sure if she or Nick is the target.Already on edge, Sam and her team start investigating a series of baffling murders. The victims are well-liked with no known enemies, and the murders are carried out in a clean and efficient manner. Unable to find a clear motive for the deaths, she feels like she's chasing her tail.