In order to reflect upon current practices of political dissent, we delve into the past and follow the experiences of a young artist. Invited to go underground in Portugal, during the second half of the 20th century, Margarida Tengarrinha played an important role in anti-fascist resistance, becoming a forger out of political activism. Given the anachronism, Clandestina is like a letter to a time yet to come, a premonition of the tragic possibility of History repeating itself.