Rocked by her husband's confession that his investment business was a complete fraud, Marilyn Tobin tries to hold her family together in the aftermath. As she prepares for her husband's incarceration, Marilyn, always up for a good fight, confronts the reality that the opulent lifestyle she enjoyed for decades is over and that Patty Hewes is out to destroy her.
In the end, Marilyn's scheming not only fails to save the family's fortune, but destroys the family as well. Disowned by her son Joe Toobin, Marilyn realizes that her world has been destroyed. In the final episode of the season, she is shown commiting suicide by jumping off a bridge into the East River.