Having made friends with Chise, Stella visits the Ainsworths’ home. Meanwhile, Elias’ behavior takes a troubling turn.

Two siblings, Stella and Ethan, get in a fight. They wish for things that they don’t entirely mean, but come to regret dearly, as they become true.

Christmas is coming up. Alice invites Chise out to London, where they hang out together and go gift shopping for Renfred and Elias.

A surge of magic threatens to kill Chise. Elias takes her to the land of fairies for treatment, while Silky is left to take care of their home.

The Leannán Sídhe begs Chise for her help: Joel is on his death bed, and she can only seem to make things worse. Chise vows to do what she can to turn that around.

Chise is attacked by yukimushi, briefly making her dangerously ill. She and Elias discuss the nature of their relationship.

Lindel finishes the staff that Chise had finished carving. As she finishes, she meets an old friend, who offers her some wise advice.

"Elias, is an odd failure who pretends to be human -- but is it because of his master's words, or because of his distrust for humans, that he stopped communicating about himself? Lindel's alias, Echoes, refers to the to a song aking to the sound of snowmelt, traveling through the wind, causing the blooming of flowers and the dancing of fairies. The magic of the song turns into a mirror the surface of the water Chise peers into. What does she see beyond the mirror?"

Chise and Selkie climb aboard a dragon's back to meet Lindel, to have her own mage's staff made. Frustrated by Chise's acceptance of her being kept as a pet by Elias, he describes the time he found Elias in the darkness. Meanwhile, Elias, who had stayed at home by himself, receives a letter from a sorcerer's college.

Having given up on life, 15-year-old Hatori Chise sells herself at an underground auction, where she is bought by Elias Ainsworth, a not-quite-human mage, for 5 million pounds. She learns that he intends for her to be his future bride, and her world begins to change.

After a life of cruel wandering, Lin has found a place to be. The good-natured Banba has invited him to join his team of private investigators as well as his baseball team, the Hakata Tonkotsu Ramens. Lin is slowly learning to feel comfortable, but still has a lingering feeling that it won’t last. He remembers his harsh past. He was being raised as an assassin, and the first partner he met was...

Targeted by a “hacker hunter,” Enokida is forced to run from place to place in Hakata. Assassins after the bounty on his head are steadily closing in, and Enokida has been cut off from using computers, his only weapon. He’s fallen into a desperate situation. Meanwhile, Banba receives a message from Enokida. It’s a desperate counter to the cyberterrorist cell which came to Banba and Lin.

Information is the second most important thing to money. A cyberterrorist cell wants to find a hacker who has uncovered some sensitive details. Meanwhile, Banba Private Investigations receives a request to find a person. They receive a photograph of a boy with an odd haircut who disappeared eight years ago. Thinking he looks familiar, Banba and Lin turn to each other just as Enokida the information broker walks in.

Saruwatari craves a strong opponent and someone proposes going after the best assassin in Fukuoka, the Niwaka Samurai. Immediately after, the phone rings Banba’s agency, but because he is at the Yamagasa Festival, Lin pretends to be the Niwaka Samurai and goes to kill Saruwatari. Forced to use weapons he isn’t used to fighting with, Lin quickly gets into trouble. Meanwhile, Banba has just gotten wind that Lin took a job while claiming to be the Niwaka Samurai.

The Yamagasa Festival, one of the three biggest festivals of Hakata, is in full swing. Banba, born and raised in Hakata, is taking time off work to celebrate. The ace assassin of a contract killer agency Saruwatari has developed a distaste for work he does not find challenging. He decides to quit and move Hakata where there is more competition. As soon as he arrives, Saruwatari’s partner from high school Nitta calls out to him. Nitta works as an assassination consultant and wants to utilize Saruwatari’s skills, but...

Working with Enokida the information broker, Lin establishes that his sister’s killer is the Mayor’s son Yusuke. Having obtained information about the next human trafficking deal, Banba and Lin form a plan. Lin will pretend to be merchandise and attempt to reach the killer. But the enemy learned of their plan. Lin’s last ray of hope Banba is brutally killed by someone known as the killer of killers. Lin now finds himself in a difficult predicament.

Saito has been blamed for a murder he did not commit and hires Jiro to get revenge on the real murderer. Meanwhile, Lin learns that his sister who he left in his hometown was killed in Hakata and confronts the killer’s employer Zhang. Blinded by rage, Lin is taken by surprise by one of Zhang’s assassins and seriously wounded. Banba the detective arrives to help Lin and pledges to help find his sister’s killer.

Hayashi had seemingly snuck into Banba's office to kill him, but Hayashi intends to protect Banba from hitmen in order to get back at his employer, Zhang. Meanwhile, Saito narrowly avoids being tortured and killed due to a case of mistaken identity by Jirou and Misaki. Celebrating his good fortune with a night of revelry out in town, Saito awakens from a drunken stupor in a hotel room to find the body of a woman he's never seen before lying next to him.

Confronting his past, Lin goes to see Fei-Lan, but fails to convince him to stop. Fei-Lan attacks Lin, but unsure if he wants to fight back, Lin becomes cornered. Banba arrives to help, but they are both unfortunately captured. Locked in a cage, Fei-Lan orders them to fight to the death and the winner will go free. Facing the same choice from his past, Lin must choose between killing and being killed.

Employed by the Kakyu Association, Fei-Lan begins to seek revenge on assassins. His first target, Saruwatari can holds his own in a fair fight, but is taken by surprise. Meanwhile, Lin has run away from Banba and is hiding in Enokida’s internet cafe. There, Lin hears about the murders of two men both named “Hayashi Noriaki.” The men wrote their name the same way as Lin, both lived in Fukuoka and were killed one after the other. Realizing that the murders are a message for him, Lin goes to confront Fei-Lan and his past.