Plot summary
The government of Colombia and a left-wing rebel group it has been fighting for 50 years are prepared to agree to a peace treaty, largely influenced by the Romeo and Juliet -like romance between the president's son and the rebel leader's daughter. As a result, the US is about to enact a memorandum of understanding with several South American countries. The agreement falls apart when the rebel leader's daughter disappears, leaving a Dear John letter for her fiance. Elizabeth convinces the daughter to reconsider, and she and her fiance convince their parents to recommit to the peace deal.
Daisy discovers Kevin, the budgeting employee that she is dating, dead in his office. Elizabeth tells her that Kevin was actually a CIA operative and that they believe he was murdered. Jay discovers that his wife is seeing a friend of his. Henry watches by remote camera as the agent that he is handling is restrained and then submerged in water as a "baptism" ceremony by the militia group.
Credits
Adapted from Wikipedia contributors, Madam Secretary season 3. HTML formatting and reference markers removed.