This thriller revolves around the O'Connor family and their son, Alex, a young CIA analyst specializing in Russian affairs. However, Both of his parents are part of dormant Russian sleeper cell that has been reactivated. His Mother was a Russian spy and she met Mark O'Connor and fell in love with him. To remain in America and build a life with Mark she would have to remain a spy. They thought they had escaped being under Russia's thumb until things change and not only does Russian want them to be spies but also their Son, Alex.
http://www.nbc.com/allegiance/video/allegiance-trailer/2840692?onid=217011#vc217011=1