When FOX greenlights a 90210 reboot, on the condition that seven of the original "Beverly Hills, 90210" cast members get on board, Tori and Jennie confront each of their former castmates and are met with more resistance than they had anticipated. Meanwhile, the gang deals with the repercussions of their actions in Las Vegas, Shannen gets a call from a friend and former "Beverly Hills, 90210" costar Christine Elise pops back into their lives.