After two decades away, Mary Ann arrives in San Francisco for Anna Madrigal's 90th birthday party. But not everyone is happy to see her.

Mary Ann decides to stay in San Francisco and tells Shawna true. The relationship between Jake and Margot comes at a crossroads. Anna knows a man.

Mary Ann asks everyone to help Barbary Lane and tries to get along with Shawna. Michael spends the night with old friends and argues with Ben.

Everyone looks for Anna after a health problem. The twins bring together social influencers at DeDe's house. Mary Ann and Brian have a candid talk.

Racing against time, Mary Ann, Michael and Brian follow leads to learn who's threatening Barbary Lane. Anna seeks forgiveness from an old friend.

The conflict at Barbary Lane comes to a head. Jake and Margot clear the air. A night of celebration leads to an unexpected discovery in the morning.