With the happy couple seeming to be enjoying an ordinary life, Vincent thinks the timing might finally be right to pop the question until Cat stumbles on an extraordinary case with the FBI involving somebody who goes on a superhuman rampage. Though reluctant to engage with the case for fear of losing the normality he has found, Vincent finds himself with no other options when Cat is injured after discovering that someone is drugging innocent victims and transforming them into super-humans. Meanwhile, Tess accuses JT of stalling his recovery as he tries to understand how he's still alive.