Eight strangers witness the assassination of the President of the United States at a counter-terrorism summit in Spain. As the fatal moment is replayed through each eyewitness's perspective, details of the murder come to light, leaving behind questions about the assassin's true identity and motive. As each witness remembers the events differently, it also brings their own secrets into focus, and the plot thickens as it is revealed that each person had both the means and motive to commit the crime. With few trustworthy characters, it becomes a race against time to uncover the truth before the assassin escapes