Anna looks for enemy intelligence at an exclusive gentleman's party against Abe's wishes.

Ben sets a trap to capture a traitor in camp. Richard discovers Abe is conspiring with Major Hewlett. Caleb collides with Robert Rogers.

Peggy gets Benedict Arnold to contact the British. Caleb plans an ambush for Simcoe. Anna tries to save Major Hewlett.

Washington heads south to lay siege on Yorktown; Abe volunteers for the Continental Army; Peggy goes into labor.