Shinichiro Hanasaki, a former detective and principal of Nikoniko Nursery, faces a 60 million yen demand from new building owner Ren Yamauchi, and is also tasked by detective Jojima with rescuing Hitoshi Kamose from the Momoi Group.
Shinichiro is surprised when Hitoshi, who was supposed to return to the countryside, asks to work at the nursery. Hanasaki also takes on a job for Keiko Imai, the mistress of a yakuza boss, to pay off a debt.
Shinichiro is tasked with finding Shigenori Motoki, a Momoi Group member, to recover money and rough him up. While searching, Shinichiro meets Yoko, who knows about the abandoned baby at the nursery. Meanwhile, Hitoshi acts independently.
The outdoor air conditioning unit at the nursery is stolen. Shinichiro receives an offer from Ren to find a specific unit within two days in exchange for waiving a payment and a new air conditioner.
Shinichiro is asked by Towa Hasegawa to care for a girl named Maria and find her mother, revealing she is Ren Yamauchi's child. Shinichiro is instructed to keep this confidential.
Shinichiro is asked by a child named Kotetsu to find his father. He also takes on a job to temporarily hold some data, despite warnings of a potential threat.
Shinichiro is arrested due to Takashi Yamato's grudge. The choreographer Emiko Barnaby, who is Ayane Mizukawa's grandmother, visits the nursery, but Ayane's mother cannot forgive her. Meanwhile, the rent payment deadline is approaching.
At the Nursery, Minami and Suzuna plan a group date, causing anxiety for Hitoshi. Meanwhile, Shinichiro investigates the late Kenichi Iida's infidelity for his widow.
Shinichiro learns that Risa Sasari is missing and rushes to confront Ren, only to find he's not involved. Hanasaki frantically searches for Risa while the Department of Health and Welfare investigates abuse complaints against Minami Ohara.