Vincent Keller spent years on the run from a powerful corporation call Muirfield after he enlisted in the Army and became a part of a failed military experiment to create super soldiers. Instead the men became beasts, and they were all thought to be dead.
On the run, Vincent saved Catherine Chandler on the night her mother was murdered and spent the next decade watching over her until she discovered him while investigating her mother's murder. The two of them fell in love.
Vincent's best friend, J.T. Forbes, is a brilliant scientist who has helped to keep Vincent's beastly secret at bay and find a cure. He was skittish of Vincent's relationship with Cat, but soon the two of them were involved solving crimes with Cat and her partner Tess Vargas.
Vincent was kidnapped and had his memories erased by Cat's birth father so that he could again be a super soldier who could hunt for and kill other beasts before they threatened others. Vincent is slowly gaining his memory in Beauty and the Beast Season 2.