Griffin was a brilliant scientist but a depraved human. In the light of this statement, draw a pen-portrait of Griffin.

Griffin is a gifted young university medical student with albinism, who studies optical density. He believes he is on the verge of a great scientific discovery, but feels uncomfortable working under his professor. To ensure he gets sole credit for the discovery, he leaves university and moves to a dingy apartment to continue his experiments alone.

To finance his experiments, Griffin robs his own father, which drives the father to commit suicide (since the money had not even been his own). Working reclusively in his flat, Griffin invents a formula to bend light and decrease the refractive index of physical objects, making them invisible. He intends from the start to perform the process on neighbours' cat and then on himself, but is forced to rush his experiments due to persistent intrusion from his landlord, who is suspicious of his activities. He processes himself to hide from his landlord, and sets fire to the building to cover his tracks. He winds up alone, wandering invisible and naked through the streets of London, struggling to survive out in the open, unseen by those around him.

To make himself visible again, Griffin steals some clothes from a dingy backstreet theatre shop, including a trench-coat and hat. He wraps his head in bandages to conceal his invisibility, covering his eyes with large dark goggles. He takes up residence in the Coach and Horses Inn in the village of Iping, so he can reverse his experiment in a quiet environment, but complications arise with locals unnerved by his appearance. As a result, his progress slows and he has insufficient money to satisfy the pub owners. To pay the bill, Griffin burgles the home of Reverend Bunting. The police pursue him, and in a fit of frustrated anger he reveals his invisibility by throwing off his clothes and escaping.

Now driven insane by his inability to reverse the experiment, Griffin seeks assistance from a tramp named Thomas Marvel. He has Marvel carry money for him, but Marvel runs away with the money. Griffin pursues him to the town of Port Burdock, where he runs into his old schoolmate Dr. Kemp. Still bitter and angry towards the rest of humanity, Griffin attempts to convince Kemp to be his visible partner and help him begin a "reign of terror". Kemp, rather than assisting the crazed Invisible Man, alerts Colonel Adye of the Port Burdock police. Furious, Griffin vows to kill Kemp, but is forced to flee. Kemp rallies the people of Port Burdock, who find and overcome Griffin when he attempts a one-man siege on Kemp's house. Griffin is surrounded and beaten to death by a mob of navvies. The invisibility wears off in death, and Griffin's corpse becomes visible again.