Joan, the ultimate New Yorker, has a glamorous apartment, her own jewelry company, and at night, she performs at comedy clubs. But she misses her family. So Joan makes the life-altering decision to move to California to be closer to Melissa and her grandson, Cooper. Meanwhile, in Malibu, California, Melissa has a great kid, and a loving and solid relationship with her live-in boyfriend, Jason (that Joan doesn't know about!) Will Joan and Melissa make it work? Tune in to see the drama unfold!

Joan only just moved in, but she’s already overstepping her boundaries. She decides to replace Melissa’s furniture – without her approval!  What do you think Melissa has to say about that?  Tune in, you don't want to miss it!

Joan visits different L.A. hotspots to spread the ashes of her beloved friend, Tommy. Meanwhile, Melissa enters uncharted territory for all Rivers women: the kitchen. She’s determined to learn how to cook. Will she break the culinary curse of the Rivers women?

It's high tea with Perez Hilton! When Joan reveals a little too much to the online gossip columnist, Melissa is not pleased with her mom's loose lips. Plus, Joan and Melissa's constant bickering gets to be too much, and they decide to bring in some professional help. Will their relationship ever be the same?

After their disastrous blowup, Joan returns to New York to appear on Late Night with David Letterman, while Melissa resumes life without Joan. Cooper misses Joan, and deep down inside, so does Melissa. Can mother and daughter forgive and forget?

Joan returns back to L.A. and patches it up with Melissa, who convinces Joan that it’s time to return to the dating world. Joan’s friends set her up a series of hilarious blind dates. Joan, in turn, encourages Melissa to get engaged to Jason.

When Joan wants more plastic surgery, Melissa protests. An intervention with Joan’s friends fails miserably, leaving Melissa playing nursemaid when Joan becomes the recovery patient from hell.

When Jason’s parents come to visit, Joan gives them a VIP tour of Hollywood. As the conversation runs dry, Joan grows desperate for a break. She calls Lynne, who has a scheme to get medical marijuana.

Melissa’s excited when Jason is included in a Rivers family photo shoot, but when Jason doesn’t show up, it results in a blow-out and Joan’s in the middle. The ordeal puts Melissa’s future in jeopardy.