In ‘Semper Fidelis’ Matt Murdock (a.k.a. Daredevil) struggles with balancing his dual identities. As a lawyer, he is needed by Foggy and Karen to strategize with the team and defend Frank Castle in court. Meanwhile, Elektra persuades him to participate in her crime-fighting adventures.
At the Nelson and Murdock office, Foggy, Karen, and Matt brainstorm ways to defend their client, Frank Castle. They think about making the insanity plea, but Karen rules it out because she doesn’t believe that Frank really is insane. They think about going after Reyes (the District Attorney) and pushing for a mistrial, but the evidence against her isn’t strong enough.
To help with their defence strategy, Karen asks Frank to think of a character witness who can speak about his time in the military. She suggests someone from his military unit, who might know what he’s been through. Frank realizes that his attorneys are going to use post-traumatic stress disorder to help with their defence. However, he doesn’t want to go along with it because it goes against his morals. Frank argues that it’s not fair to pretend he has PTSD from war when there are veterans who really suffer from PTSD. The reason Frank has taken the law into his own hands is because of how his family was killed in the crossfire of a gang massacre, an event that occurred after war.
As Matt is practicing his opening statement for Frank’s trial, Elektra calls and asks for his help. She has tracked down an Asian Studies professor who encrypted files for the Yakuza. Even though Matt says he won’t drop everything whenever she calls, he kind of does. Elektra and Daredevil intimidate the professor enough to decode the files for them, and they find out where and when the next shipment will be. At the shipyard, Elektra and Daredevil find crates filled with soil. Next, the pair are ambushed by the Yakuza and a fight ensues. After the action, Elektra has a notable gash in her arm, and they go back to Matt’s apartment to nurse her injuries. Elektra and Matt compare scars and wounds, and they discuss Matt’s run-in with Nobu from Season 1.
The next morning, the trial is beginning at the courthouse and Matt isn’t there to deliver his opening statement. Instead of reserving the right to deliver the opening statement at a later time, Foggy delivers an unprepared, but compelling speech. His strategy is to put the blame on the justice system for the murders of Frank’s wife, daughter, and son. Foggy compares the massacre of the Castle family to the warzones Frank experienced as a marine, and argues that the justice system failed to look into the murders. Part way through Foggy’s speech Matt shows up in court, and he later tries to explain himself to Karen and Foggy.
Back at Matt’s apartment, Matt and Karen discuss vigilante justice. This conversation puts Matt’s dual identities at war with each other. On one hand, Matt is a Catholic lawyer, who ought to believe in God’s will and the justice system. On the other hand, Daredevil often takes matters into his own hands when he stops criminals in Hell’s Kitchen. Karen wonders whether there’s a difference between someone who saves lives (a.k.a. Daredevil/Matt) and someone who prevents lives from needing to be saved at all (a.k.a. the Punisher/Frank Castle). Matt reasons that it’s not up to Frank who lives or dies, he believes that it’s up to God or a jury. Karen says, “Right or wrong, you can’t deny that it works,” which creates tension between them and they decide to call it a night.
The next day, Tepper, who was the chief medical examiner responsible for filling out the autopsy reports on the Castle family, is put on the stand as a witness for the trial. Before Matt can really get into questioning him, Tepper says he needs to say something about what he did. He admits that he was pressured to alter the autopsy reports on the Castle family, as well as, an adult male John Doe. However, this confession from Tepper will be disregarded in this case because it is revealed that Tepper confessed only because he was threatened the night before. As Tepper describes the woman who threatened him, Matt realizes that it was Elektra.
In the courthouse washroom, Matt tells Foggy that it was Elektra who threatened Tepper, not someone from the D.A.’s side. He fills Foggy in with how Matt and Elektra have been going after the Yakuza and trying to protect the city. Foggy is understandably upset. He yells at Matt for pushing them to take Frank’s case and not pulling his weight with the case.
At night, Daredevil shows up at the Midland Circle property to meet Elektra. He’s angry at her for intervening in his trial and threatening Tepper, which reveals Matt’s hypocrisy when carrying out justice. Elektra points out that she was just doing what Matt had always done, “When you don’t get what you want by day, you take it by force at night.” So far, Elektra’s involvement in the show has brought out a different side of Matt, and in this episode she points out how hypocritical he can be.
The episode ends with Daredevil and Elektra finding a giant hole in the ground, which explains the crates of soil they found earlier in the episode.