A Chance Encounter
An unknown girl with invisible hands, or vectors, and telepathic powers escapes from a secret facility. The next day two cousins, Kouta and Yuka, find her. But she is different from before. She can only say one word, nyuu. Not knowing anything about her, the two cousins take her in. Kurama, the head scientist from th efacility where she escaped, has sent a merciless man, Bando, after her.
Episode 1•25m
Annihilation
The offshore facility, headed by the scientist Kurama, sends a special task force, headed by the ruthless, cold-hearted assassin Bando, to hunt down Lucy at a beach in Kamakura. However, they only encounter her in her innocent "Nyu" state. She is hit over the head by Bando. Bando then tells his partner to finish Nyu off, but the hit reverts Nyu back to Lucy, who kills Bando's partner, and goes after Bando. Lucy uses a firearm to shoot and injure Bando. In the end, Bando has been dismembered and blinded. Lucy reverts to Nyu before she is able to kill Bando. It is seen here that Lucy and Nyu switch between each other depending on the events surrounding them. After being injured by Bando, Kohta is put in the hospital, but is not severely injured, and is released hours later while Yuka goes looking for Lucy. He encounters her back at the house and forgives her.
Episode 2•25m
Deep Feelings
It’s the calm after the storm... but the calm won’t last long. Kurama and the secret facility are sending two people after Lucy. One is the newly healed and stronger Bando. The other is a diclonius just like Lucy. At Kouta’s house, Yuka and a homeless girl named Mayu talk about the events that happened two nights ago at the beach. All of a sudden, Nyuu slips and falls. She bangs her head and Lucy awakens inside of her.
Episode 3•25m
Attack
After alerting the soldiers and Kurama to Lucy’s whereabouts, Nana confronts her and the two begin to fight in a cemetery. Can Nana hold Lucy off long enough for Kurama and the others to arrive? Meanwhile, hearing loud noises in the cemetery, Mayu stumbles upon the two fighting.
Episode 4•25m
Receipt
Mayu’s tragic past is revealed. She remembers back to when she ran away from home. At school, Yuka and Kouta’s new professor is none other than Yu Kakuzawa, Chief Kakuzawa’s son. He instantly notices Nyuu as Lucy and tricks Kouta into handing her over to him.
Episode 5•25m
Innermost Feelings
Bando escapes from the hospital, still trying to find Lucy to satisfy his grudge against her. Professor Kakuzawa Yū's decapitated body is found by his assistant and Kohta. While searching for Lucy, Kohta and Yuka develop a fondness for each other as displayed through a kiss. Finally, Lucy is found by Kohta and Yuka and taken back home.
Episode 6•25m
Confrontation
After fighting, Bando and Nana realize that they are allies and not enemies. Nana agrees to bring Lucy to the beach when she senses her. Meanwhile, at the temple, Mayu meets Nana. The two become friends and Mayu agrees to bring Nana back to her house for food.
Episode 7•25m
The Beginning
After Lucy is knocked out by Nana Kouta tends to her. She sleeps and relives her childhood in a dream, revealing many things about her. Meanwhile, Nana tells Mayu about Lucy and the diclonius and Arakawa is called in to work for Director Kakuzawa...
Episode 8•25m
Reminiscence
More of Lucy's past is revealed: Her meeting with Kouta, their friendship that will end in tragedy, and the reason why Lucy became the killer she is today.
Episode 9•25m
Infant
Lucy and Nana start to fight, but Mayu stops them and Lucy turns back to Nyuu, hugging Kouta and telling him she likes him. Later, Kurama's past is revealed and so is more about the dicloniuses.
Episode 10•25m
Complication
Number 35, Mariko, is released and immediately kills the soldiers around her. The professors, who were prepared for this, set off one of the explosives inside her, destroying her arm. Later, they fly her to where Nyuu and Nana are. Meanwhile, Nana is enjoying living in the inn but Kouta tells her she needs to work as well. Things seem to be going as peaceful as it can get...
Episode 11•25m
Quagmire
Mariko is torturing and playing with Nana like an insect while Kouta runs to her to protect her. Mariko temporally looses her vectors, thanks to Nana, and has to be sent back. Nyuu follows Kouta, but when the soldiers start to shoot at her she turns into Lucy. Seeing the bloodthirsty Lucy, Kouta recalls everything...
Episode 12•25m
No Return
Yuka informs Mayu of Kouta's past. Meanwhile, Lucy and Mariko find each other and face off in a fight. Now, Nana and Kurama have to find Mariko because Kurama needs to kill her...
Episode 13•24m
The Diclonius, a mutated homosapien that is said to be selected by God and will eventually become the destruction of mankind, possess two horns on their heads and have a "sixth sense" which gives them telekinetic abilities. Due to this dangerous power, they have been captured and isolated in laboratories by the government. Lucy, a young and psychotic Diclonius, manages to break free of her confines and brutally murders most of the guards in the laboratory where she is being held, only to be shot in the head as she makes her escape. She survives, falling off a cliff into the ocean and manages to drift along to a beach where two teenagers, Kouta and Yuka, discover her. Having lost her memories, she was named after the only thing that she can now say, "Nyuu," and the two allow her to stay at Kouta's home. However, it appears that the psychotic side of Lucy is not dead just yet... (Source: ANN - Revised)
