To protect and serve.... All Vance Connelly ever wanted to do was continue his family's tradition and join the Tampa Police Department, but his dreams were crushed the day he woke with the enhanced mark on his face. After years of struggling to adjust to life as an enhanced human, by a stroke of luck, he met Talon Valdez and became a proud member of the FBI's Human Enhanced Rescue Organization.Samuel "Angel" Piper is eager to leave his DEA undercover work behind as he joins the HERO team as Vance's regular human partner. But Sam's painful past is ever present, just below the surface of the life he has built for himself as an ambitious young agent. When the team investigates rumors of a new drug using enhanced blood, the case's mysterious connection to Sam threatens not just his life but Vance's.Trust doesn't come easy for Sam, but Vance is willing to fight to convince his partner that the strength of his heart might be the salvation they both need.