When Theo and Vic hit a relationship milestone, Vic is forced to reckon with her feelings about commitment. Andy takes refuge at Dean's home and helps care for Pruitt, while Dean considers a new potential career opportunity. Meanwhile, an explosion rips apart a neighborhood and changes the lives of our firefighters forever.

Vic and Jack lean on one another as they process the loss of Dean while Ben and Bailey try to convince Dean's parents to allow them to raise Pru. Meanwhile at Station 23, Andy's role temporarily expands and Sullivan subs in. Carina and Maya explore growing their family.