Bash's career is threatened, leaving him with a major decision to make. When a toxic father needs a liver transplant, Bash deals with the man's estranged son. While treating a woman having strange reactions to a spider bite, Mags employs a strategy to work alongside Novak. Theo helps a young lupus patient make her dreams come true, and takes steps to rebuild his life. June discovers her father's secret. Dr. Bishop and Claire begin a new chapter.