Rebel and a group of residents take a stand to fight for clean water. Meanwhile, Cassidy's new role puts the Stonemore case in jeopardy, and Grady grows frustrated when Rebel remains consumed with her work; and Cruz reaches his breaking point.

Rebel goes to great lengths to help save Helen's life after being denied her surgery and continues to push Cruz to negotiate the recall and study of the heart valve. Meanwhile, Cassidy and Lana try to help Luke when his personal life jeopardizes his career and reputation. Elsewhere, Cruz gets close to someone new.