Roger has worked rather too late, and just completed a little sketch of a nymph when he knocks over the ink. Knowing it's futile, he doesn't try to stop it; he just closes his eyes -- and opens them to see the nymph walked away.
He tries to deliver for a job only to find that his past -- an occasion where a client swore he had not delivered -- is still haunting him. And he sees his old friend and fellow artist Kevin doing a signing, along with his trophy wife Julia -- Kevin's ex-wife Donna, looking ghastly, shows up to dun Kevin, and Roger tells Kevin he must have been hallucinating: he saw a drawing come to life.
When he gets home, he finds he wasn't hallucinating at all. The little nymph even comes out of the drawing to walk. Except that two people, Penny and Red, show up, claiming to want to buy an original, but producing a painting and going to shove him into it, after telling him they are from Kevin. (They do look like Kevin's painting of Achilles and Penthesilea, but Kevin doesn't use live models any more.) Roger, in the heat of the moment, manages to thrust himself into a different painting, one of his own.
Then there's just escaping it, discovering what Kevin is up to, and stopping him. . . .
It features a superhero, a SF convention, an enormous spider, games of volleyball, things right out of Edgar Allen Poe, tangled romance, a father-and-son reconciliation, an expert in guns and cooking, ninjas, a troll, and much more. I particularly like what he did with Red and Penny.