He came in the morning when they were still making lunches and getting ready for school and work. He killed them all -- mother, father and children. Brutally slaughtered them in the comfort of their own home. They called him the Monday Morning Killer. That was forty years ago, but now it is happening again. A mother and her daughter are brutally murdered in their house, on a peaceful Monday morning in Cocoa Beach, Florida. Detective Jack Ryder has enough on his plate being home alone with six kids and his wife -- country superstar Shannon King -- on tour. This case takes his anxiety to a new level when he realizes the crime scene matches unsolved murders from four decades prior. He worries that a deranged serial killer has returned to Cocoa Beach. No one feels safe, especially not the girl next door, who just bought the house where the first family was killed forty years ago. Who is capable of such cruelty? And why? Could one person be responsible for these brutal killings of entire families so many years apart? Or is Jack dealing with a copy-cat?