Jonrosh's (Ferrell) epic story continues as growth of the Morehouse Conglomeration further confuses the forbidden love between Devon (Maguire) & Cynthia (Wiig). Cynthia makes a reckless business decision and Devon wages war against her.

Jonrosh's (Ferrell) final chapter finds Winston (Osment) out to destroy his family, stopping at nothing to get his revenge. A Christmas party brings together Cynthia (Wiig), Devon (Maguire), Winston and the Shah of Iran.