For 20 years, conceptual artist David Greg Harth carried a Bible with him every single day, seeking signatures from the most culturally significant people in the world. In The Book of Harth, filmmaker Pierre Guillet follows the artist during the final year of his absurd quest, trailing him to scenes of frenetic celebrity worship. As Harth secures signatures behind stage doors, in city streets, and on the fringes of red carpets, Guillet cops spontaneous interviews with previous signees, from Noam Chomsky to Kevin Smith. As the last hours of his magnum opus draw to a close, Harth struggles to reconcile the project's meaning with it's personal cost.