In a world plagued by malicious ghosts, how can one combat such evil spirits? The solution is to hire a "Ghost Sweeper"—a professional exorcist tasked with exterminating unwanted ghouls or poltergeists. Among Ghost Sweepers, Reiko Mikami is regarded as superior to the rest. After receiving an offer to investigate a haunting near Jinkotsu Hot Spring, she deploys her skills. Accompanied by her assistants—the underpaid and perverted high school student Tadao Yokoshima and the friendly teenage ghost Kinu Himuro—GS Mikami chronicles the wacky exploits and adventures of this trio as they investigate paranormal activities.