A portrait of the well-known 80 year-old Dutch composer and church musician Willem Vogel.Since the 1950's he was involved with the renewal of the liturgy in Christian as well as Roman-Catholic public worship. He is considered the Nestor of Dutch churchmusic, also abroad he is regarded an important church musician.

The title of this documentary was taken from one of his compositions: hymn 301, that has become widely known.The cause and inspirations that define the work and life of Willem Vogel are paramount in this documentary. It also gives a brief illustration of the development of churchmusic in Holland since the Second World War.

This documentary shows the active life of Willem Vogel: He composes every day, teaches organists leads the annual manifestation "Haarlem sings" in the St. Bavochurch.