Chisato reluctantly went to DA Headquarters for a health checkup and physical fitness test. When Takina heard, she decided to tag along to make a direct request for reinstatement at DA. With Chisato, Takina negotiates, but their commander will hear none of it. Moreover, her ex-partner Fuki is teaming up with a new companion.

Chisato's artificial heart was targeted. Now that the battery can no longer be charged, the remainder of Chisato's days are set. Kurumi, who chases down clues about the irreplaceable artificial heart, asks Mika about what happened back then. Meanwhile, Chisato is summoned to Headquarters as DA prepares for a large-scale operation to suppress Majima.