Baye Fall is a Muslim practice derived from mouridism, a Sufi based faith deeply rooted within Senegalese culture. Through the story of one family, the film explores the beliefs and lifestyle of Baye Fall followers.

Most of the walls of houses in Saint Louis, Senegal, are covered with paintings depicting the master of the Mourid Brotherhood, Amadou Bamba. These frescoes are also to be found on ships' flags, on barouches, and in bedrooms. Most of them bear the signature of Thiam B.B. This film introduces us to Mourid ideas through these paintings and a meeting with Thiam, a mystical, vagabond painter.