The Teen Titans are battling Plasmus on the streets of Jump City. Cyborg punches Plasmus into defeat, unknowingly releasing radiation onto his armor, causing it to melt away. Back at Titans Tower, Cyborg complains about his missing suit when Starfire suggests that he just make more. He explains that he had to custom order his parts and that they won't arrive for three days. Robin tells him to stop whining as Doctor Light is on rampage downtown. Cyborg, spotting an open closet, tells the others to go on ahead and that he'll be right behind them.
The Titans are battling Doctor Light when Robin asks about Cyborg's whereabouts, saying that he'll miss the whole fight. At that moment, a sonic cannon blast knocks Doctor Light off of his feet. The Titans turn to see Cyborg wearing a trench coat which Beast Boy says looks rad. In Titans Tower, Cyborg is showing off how cool he looks in the trench coat when he shoots his sonic cannon. However, Beast Boy, now wearing a jacket, claims that Cyborg isn't the raddest Titan anymore. Cyborg says that Beast Boy just ripped off his style, but Beast Boy claims that it's different as he's also wearing a hat and sunglasses as opposed to just a jacket. Robin asks if that is how cool math works, but Cyborg denies. Cyborg tries taking off Beast Boy's jacket, saying that he has to wear the jacket to hide his armor injury and accuses Beast Boy of being a poser. Starfire questions how a jacket makes one cool as she thought they were just meant to keep someone warm, but Robin admits that he thinks a rhino wearing sunglasses, a hat, and jacket is cool. Raven admits that she doesn't know if their fight is dumb or amazing when Starfire says that something feels missing. Robin answers that maybe more things would make someone cool. The alarm begins to blare and Cyborg announces that the H.I.V.E. Five are attacking downtown. Robin tells Beast Boy and Cyborg to go on ahead, and that the rest of the Titans would be there shortly.
Back at downtown Jump City, Gizmo is instructing the H.I.V.E. to attack when he notices that only Beast Boy and Cyborg have shown up. They apologize for the inconvenience and assure them that the others would be arriving shortly. Jinx compliments Cyborg on his jacket, but wonders if the heat is making him uncomfortable. Cyborg tells Jinx that everyone else would be uncomfortable if he wasn't wearing the trench coat. Beast Boy approaches Gizmo and asks him to decide whether he or Cyborg looks the raddest. Gizmo states that the two look dumb to him and questions why they aren't fighting. Beast Boy tells Gizmo that he can admit that he is the raddest superhero when Robin arrives, dressed in a jacket, sunglasses, and pouches. He throws projectiles at Gizmo, who questions why Robin just pelted him with peanuts. Robin apologizes and begins looking around for the smoke bomb pouch. Gizmo attacks Robin, and Starfire, dressed in a new jacket, appears, claiming that she'll save Robin from the H.I.V.E. Robin tells Starfire that she looks hot and she begins to panic as she is supposed to look cool. Cyborg notes that things are getting ridiculous and Beast Boy agrees, claiming that Robin stole the sunglasses from him. Cyborg reminds him that he stole his look from him when Raven, also dressed in a new jacket, claims to have second thoughts about her new look. Gizmo interrupts, asking if they are going to fight.
The Titans and the H.I.V.E. begin to battle with Gizmo mocking Robin for not trying. Robin tells Gizmo that once he locates the right pouch, Gizmo will be in a world of trouble. Cyborg, fending off Mammoth, tells Robin to use the staff on his back, but Robin admits that his many straps are holding his arms back from reaching it. In the background, Raven's headband is being pulled by See-More as she is battling Jinx while Beast Boy, as a snake, wraps himself around them. Starfire is battling Billy Numerous when she notices that her gloves have trapped her starbolts and are hurting her. Eventually, the Titans are defeated, except for Cyborg. He shouts for help, but Mammoth knocks him down with a punch. Gizmo celebrates their victory and admits that he thought the Titans looked cool and takes Beast Boy's sunglasses. Jinx tells Cyborg that the "Battle Armor" version of him is pretty cute look as well. As the H.I.V.E. leave, Jinx asks Gizmo if he wants to raid anymore of their stuff, but Gizmo denies as he's taken the sandwiches and snacks out of Robin's pouches.
Back in Titans Tower, Cyborg says that something is ridiculous. Raven asks if he means them dressing up and trying to act cool while Starfire guesses that he's talking about her hurting her hands when she was trying to make herself cool by becoming hot. Beast Boy says that he's referring to Robin not giving him his sunglasses even though he also has a mask. Cyborg denies all the guesses, saying that it's ridiculous that it took so long for him to receive his spare parts. However, he notices that S.T.A.R. Labs mixed up his orders and only sent him a helmet. Beast Boy suggests that they work with it and instructs Cyborg to take off his clothes.
On the streets of Jump City once more, Robin notes that Killer Moth is attacking the city. Raven wonders if anyone else notices the amount of criminals attacking the city recently. Killer Moth tells the Titans that they're outmatched when he spots Cyborg (in his helmet and without his trench coat or armor) and asks about his identity. Beast Boy claims that Cyborg is a new killer robot Titan and asks if Killer Moth wants to see how a moth fares against a killer robot. Killer Moth immediately leaves and Robin cheers for their success. He suggests that the Titans go and get pizza to celebrate. Cyborg removes his helmet and says that he could go for pizza, but Beast Boy tells him to put the helmet back on as he's supposed to be a killer robot. On the way back to Titans Tower, Cyborg asks for a little bite but Starfire refuses until they get to the Tower. Cyborg suggests that the Titans take turns wearing the masks and pretending to be killer robots or he could put the jacket back on. Robin says that killer robots don't eat pizza, don't yell "booyah!", and don't wear cool jackets when Raven says that she needs to get on a team of robots.
For a full transcript of "No Jacket Required", click here.
Raven breaks the fourth wall when she questions the amount of villains appearing in the last ten pages which is the length of the printed version of the comic.
Jinx and Cyborg's relationship began in "Opposites".
Billboards of Aquaman, a campaign for Harvey Dent, and an ACE advertisement appear on top of Jump City buildings after Plasmus' defeat.
The box containing the helmet at the end of the comic is from S.T.A.R. Labs and is addressed to Victor and signed, "From Dad" referencing Cyborg's real name, Victor Stone and his father, who worked at the laboratory.