The evil Parasytes have sent a private investigator to learn all they can about Shin, the one person who is a threat to their plans. When Shin turns the investigator against his employers, the Parasytes use swift and violent force to see that their secret doesn't get out.

Shin
A 16-year-old student, Shin is the only thing standing between humanity and alien domination. A Parasyte attacked Shin, but before it could fully assimilate with him, he was able to trap it in his left arm. Although Shin feels obligated to tell people about what has happened to him and about the alien invasion underway, he fears for the danger it would place him and his loved ones in.

Lefty
The Parasyte that attacked Shin is appropriately named Lefty. It has developed a personality of its own and is very inquisitive, but like other Parasytes has no emotion.

Parasyte - published in Japan as Kiseiju ("Parasitic Beasts") - was created and drawn by Hitoshi Iwaaki. It was originally serialized in the Japanese manga magazine Afternoon. The popular ten volume manga series later won the Kodansha Best Sci-Fi Award in 1993.