Sam Adams attempts to deter his cousin John from standing in defense of redcoats at the Boston Massacre, but John later changes his mind and joins the revolution.
John Adams is declared the voice of independence at the Philadelphia Continental Congress following the Battles of Lexington and Concord.
John sails to France alongside John Quincy to join Benjamin Franklin on the American mission, but diplomacy doesn't bode well with John Adams's blunt attitude.
John Adams manages to secure a loan from the Netherlands to his new country. Meanwhile, Abigail goes to him in France while he aids in negotiating the peace treaty.
Adams's unidentified role as vice-president frustrates him, and he also disagrees with Thomas Jefferson over his advocacy for a strong central government.
Adams becomes president, and he still carries on with Washington's neutrality policy between England and France, in spite of opposition within his own cabinet.
During his retirement in Peacefield, John Adams reflects in regret on some aspects of his public life, and deals with personal tragedies.