“Who are you? I’ll make sure you return home...”

There are over 20,000 dead bodies that have been found all over the country but remain unidentified. Every year, that number increases. Why did they have to die as someone without even a name?

In the Metropolitan Police Department, there’s a unit tasked with identifying nameless bodies and returning them to their families and partners. Among the investigators are two female buddy cops who scramble to unveil the truths behind the deaths. Sakura, who volunteered to be assigned to this not-so-popular unit, teams up with Makoto, her serious and earnest classmate from the academy. Despite the 10-year age difference and completely opposite personalities and interests, they share the same motivation to return as many unidentified persons as possible. Each carrying personal burdens from the past, their struggles take an unexpected turn in this procedural series, forcing them to finally face the unsolved mysteries involving themselves.