Unraveling like a lush, gripping novel that constantly subverts expectations, The Oath is the interlocking drama of two brothers-in-law, Abu Jandal and Salim Hamdam, whose associations with al Qaeda in the 1990s propelled them on divergent courses. The film delves into Abu Jandal's daily life as a taxi driver in Sana’a, Yemen, and Hamdan’s military tribunal in Guantanamo Bay prison. Abu Jandal and Hamdan’s personal stories—how they came to serve as Osama bin Laden’s bodyguard and driver respectively—act as prisms through which to humanize and contextualize a world the Western media demonizes. As Hamdam’s trial progresses, his military lawyers challenge fundamental flaws in the court system. As charismatic Abu Jandal dialogues with his son, Muslim students, and journalists, he generously unveils the complex evolution of his belief system since 9/11.