When Cooper's patient contracts measles, everyone at Oceanside Wellness must be quarantined. Meanwhile, Naomi tries to talk Addison into working with her rival, Wyatt; Violet and Pete contemplate their friends-with-benefits relationship; and Dell fights for custody of his daughter.

A disturbed pregnant patient has lost her baby, and Violet must convince her that her baby needs surgery. Meanwhile, Cooper must tell a patient he needs part of his jaw removed due to a fast-growing cancer. Dell must cope with his daughter's absence when his ex has to move for a new job Sam and Addison must hold back their feelings for two unattainable people.

As Violoet chooses between Pete and Sheldon, she must also deal wtih a grief-stricken patient. Meanwhile, Dell worries about his daughter when Heather returns to town and Naomi debates moving to Pacific Wellcare.

While Addison deals with the unwelcome arrival of her father, Cooper is arrested because he refused to cooperate in a case involving a longtime patient. Meanwhile, Pete will stop at nothing to keep a terminally ill patient alive for as long as it takes for him to meet his new daughter.

An explosion at Dell's house lands Betsey and Heather in the hospital. everyone is pushed to the limit in trying to save their lives.

The tensions between Addison and The Captain rise even more when her mother, Bizzy, shows up and a shocking family secret is revealed.