Masatake Kuji is an informant to Nango, a police detective.
Nango treats him like a whore and orders him to act as a watchdog over Song, a priest of a little church in Roppongi.
Kuji first met Song when he served a jail sentence and fell in love with him when Song visited the jail.
Kuji starts to work as an organ player in the church and reports all the names of people Song meets.
He is curious to know why Nango wants the information.
One day at a meal distribution site he meets a man who works for homeless people and comes to know Song's hidden stories.

The love story of sacrifice and atonement.