Meredith breaks a hospital record; the doctors are sent scrambling in the wake of a massive overdose within the community; Jackson wants to take Maggie camping; Levi and Nico's relationship continues to develop.
A sea of patients flood Grey Sloan Memorial after gunfire goes off at a parade. A blast from the past throws Maggie off her game on the same day that Meredith tries to talk to her about dating Deluca. Meanwhile, Owen ...
Meredith thinks about her loyalties while Alex deals with the fallout of his actions; Amelia and Owen host a dinner party with surprising guests; Jackson makes a suggestion to help April through her recovery.
A familiar face returns to Grey Sloan throwing many of the doctors for a loop. With Catherine putting on the pressure, Bailey has to make a decision about Alex while a tough ER case makes Amelia's bad day even worse.
Richard, Jackson, April and Catherine tackle a grueling trauma case intensified by hospital politics; Amelia finally faces her feelings about Owen; Meredith gets caught between Nathan and Alex over a patient.
The doctors of Grey Sloan encounter a difficult case involving a dangerous patient; Owen receives life-changing news that pushes Amelia to step up to support him; Alex attends a medical conference after making a shocking discovery.