When Annalise's resolve to certify her class action lawsuit is tested, a surprising ally comes to her aid. Meanwhile, Laurel and Michaela hit a roadblock after someone discovers their plans to take down Laurel's father.

As a police investigation gets underway after Simon's accidental shooting, the "K4" deal with a new set of obstacles. Meanwhile, a distraught Annalise finds herself in an unimaginable situation as Laurel and her baby struggle to cling to life.