He's a guardian. Not an angel.
The San Francisco-based series follows the life of Christopher Chance (Mark Valley), a unique private contractor, bodyguard and security expert hired to protect his clients. Rather than taking on the target's identity himself (as in the comic book version), he protects his clients by completely integrating himself into their lives, to become the human target. Chance is accompanied by his business partner Winston (Chi McBride) and hired gun Guerrero (Jackie Earle Haley). He puts himself on the line to find the truth behind the mission. Even his own business partner Winston doesn't know what drove him towards this 'life