When Danny sells some of his parents' ghost-hunting junk to make money to buy a cool new outfit, the objects take on a life of their own and go on the attack. Now he must defeat Technus, the Spectral Master of all things technological, without ruining his new duds.

After a series of humiliating run-ins with Dash, the school bully, Danny uses his powers to get revenge and triggers the ghost of Poindexter, a kid who was shoved in his locker so many times he haunts it to this day. Danny must battle this ghostly defender of nerds and geeks, while proving he's not the bully Poindexter thinks he is.