It turns out that Penny runs an online help site. Unbeknownst to them, they had been talking online at Penny's site for a while. Cam is still getting over the death of his grandmother. He was very close to her. She helped him get into the movie business. Cam is on a terribly famous series.
As an aside, Penny gets involved in public speaking. Cam reacts badly and ghosts Penny for a while. Then some other guy in the public speaking team appears to move in on Penny romantically. Cam finally gets up the nerve and shares his feelings with Penny. Penny shuts him down, thinking her disability would hold her back.
Of course these two get together in the end. She had promised to attend a public release of the latest season of his show. At this red carpet even, Cam is able to pin Penny down and address her reservations at them dating.
