An undercover operation targeting drug smugglers goes wrong, and Boston PD's homicide HQ is next in the gang's firing line.
Christian agrees with Ava to operate on baby Raphael in exchange for her to stay out of Matt's life who has abandoned everyone to be with Ava. While preparing to leave for London, Julia worries about Sean's mental state of mind as he continues to be in denial to his feelings of abandonment.
The angry and bitter Julia visits Sean and Christian in Los Angeles to share some life changing news, and she also rejects romantic advances from both men. Meanwhile, Matt gets a blast from his past when Ava Moore, who has caused immeasurable family chaos years ago, turns up as Matt prepares to marry Ramona.
Sean and Christian begin group psychotherapy in an attempt to resolve their escalating problems, with both revealing long-held secrets and their true perspectives on one another. Meanwhile, Matt announces his plans for his own future and introduces Sean and Christian to his fiancée Ramona.