Parasyte -the maxim-

On a quiet night, unsuspecting high school student Shinichi Izumi is attacked by an alien creature that burrows deep into his right arm. The next morning, Shinichi comes to learn that this being, known as a Parasyte, is now a part of him.

Shinichi and his Parasyte, Migi, battle for control of his arm as the Mincemeat Murders increase. When another Parasyte becomes hostile, they must work together to survive.

With the number of murders growing by the day, a new Parasyte appears at Shinichi's school. He tries to learn if she is friend or foe before his classmates are put in danger.

After the events involving Ryoko, Shinichi and Migi are slowly adapting to one another. But the closer Shinichi grows to Migi, the further he drifts from his family as he struggles to keep them from discovering his secret.

A violent confrontation brings Shinichi face to face with Kana, who takes an interest in him. His parents continue their vacation, but their trip is cut short unexpectedly.

With Shinichi at the brink of death, Migi takes drastic actions to ensure his host's survival. He races against time to recover and investigate his father's fate.

Shinichi sets out for revenge and runs into an unexpected ally. When Migi falls asleep, Shinichi is forced to engage an enemy all on his own.

As Migi continues to change Shinichi and those around him grow wary, a new Parasyte emerges from the shadows and begins attending his school.

The divide between Shinichi and Satomi continues to grow. Shinichi's classmate, Yuko, investigates Hideo and unknowingly stumbles upon a dangerous secret. Meanwhile, Ryoko Tamiya, now known as Reiko Tamura, plots behind the scenes

The confrontation between Yuko and Hideo comes to a gruesome head when Hideo goes on a rampage throughout the school. With Satomi missing, Shinichi must hurry and find her before Hideo can get to her first.

Kana's interest in Shinichi transforms into full-blown obsession when she discovers that she is able to sense his presence. Little does Kana know that it isn't Shinichi she can sense, but something much, much darker.

Shinichi finally decides to reveal his secret to Kana to protect her from the danger she has placed herself in. However, his actions have tragic, unforeseen consequences.

In the aftermath of loss, Shinichi struggles to feel anything but indifference, questioning his own humanity. He soon realizes that he is being watched.

The private detective Kuramori discovers Shinichi's secret and flees. Concerned about his intentions, Shinichi seeks help from Mamoru in order to track him down.

Kuramori reluctantly decides to help Shinichi hunt down Reiko and her group of Parasytes. But when a strange man appears, Shinichi soon goes from the hunter to the hunted.

A powerful Parasyte unlike any Shinichi has ever seen before attacks, and soon he and Migi are running for their lives. Meanwhile, Kuramori puts his family in harm's way.

After Reiko's judgment is called into question, three members of her own group seek to eliminate her. With Reiko otherwise occupied, Kuramori takes advantage to seek revenge for his family.

Now questioning humanity and Parasytes, Reiko encounters Shinichi and Migi one last time. When police arrive on the scene, Shinichi soon finds himself the center of attention.

Investigators hold Shinichi, certain that he's hiding something. In an effort to get him to talk, they soon bring him face to face with a uniquely skilled serial killer.

The police commence their operation to take out Hirokawa and the remaining Parasytes, but plans go awry when they fight back. Things take a gruesome turn when Gotou appears.

In the chaos of the raid, Gotou escapes and vows to return to kill Shinichi. Plagued by fear and with nowhere left to run, Shinichi turns to Satomi for comfort.

Shinichi decides to take Gotou head on and tracks him to a remote area to fight him. When the battle goes awry, Migi makes an unexpected sacrifice.

With Migi no longer at his side, Shinichi attempts to take on Gotou by himself one final time.

After Migi says his final farewell, it seems like Shinichi's life can finally return to normal until an unexpected enemy resurfaces.