Chapter 1015 is titled "Chains".
Queen and Charlotte Perospero are on the verge of overwhelming Chopper and the alliance fighters on the Live Floor, but Sanji then arrives and attacks Queen, causing the All-Star's long brachiosaurus neck to spin around and strike Perospero.
Meanwhile, as Kaido finishes off Kin'emon by piercing through his chest, Momonosuke realizes the voice inside his head is from Luffy. As he and Shinobu flee from Kaido, Momonosuke finds a frog Mary and uses it to broadcast Luffy's message to him: that he is alive, and will return to the battle. The alliance fighters rejoice and renew their confidence, and Luffy is found underwater by the Heart Pirates in the Polar Tang. Kaido chases Momonosuke and Shinobu to the edge of Onigashima, and Shinobu uses her ability to break off the ground they are standing on. Kaido is then confronted by Yamato, who calls him by his name and expresses the intention to break off their bond.
The samurai and Chopper cry in sadness and fear over the possibility that Luffy is dead, with several of them wondering if they should keep fighting and if Momonosuke is safe. Briscola, who despite having consumed Tama's kibi dango, was still fighting against the samurai due to having not been given an order yet, and says that it isn't that the enemies are weak, it's just that Kaido is too strong.
Izo and Kawamatsu know that the message was to hurt everyone's morale but Sanji becomes annoyed at how several are losing their will to fight. As for Queen, he defeats Chopper and tells him he was just playing with him since Chopper seemed so sure he could beat him. Also, Perospero fires a Candy Shower of candy arrows causing the samurai to run in fear and take cover. Queen then reveals his teeth to have retractable spikes and calls Chopper a coward as he prepares to kill him, but Sanji comes to the rescue and attacks Queen with Diablo Jambe: Rotisserie Strike, smacking him around while also deflecting Perospero's candy arrows, while he also knocks Queen into Perospero and knocking him away.
Sanji commends Chopper for how long he stood his ground as Chopper tries to tell him about Luffy. Sanji, however, scolds him for crying and reminds him of all the miracles Luffy has pulled off in situations like these. He hands the bandaged Zoro off to him commenting he is worth at least ten men (which Zoro retorts that he is worth two thousand) as he says he will handle Queen as he identifies Sanji as Judge's son. The samurai are in disbelief as to how the Straw Hats are still fighting despite the announcement that their captain is supposedly dead, and Marco reveals this is why he likes them.
Up on the First Floor, Shinobu runs away with Momonosuke as a heavily injured Kin'emon tries to stab Kaido with his broken sword. He thinks back to when he told Momonosuke to call him father to hide his connection to Oden and how they eventually succeeded in pulling off the illusion. As for Kaido, he asks Kin'emon what the point is in buying time and running as he stabs him through the back with a sword. He tells him that it isn't easy to accept defeat but he should embrace his honorable death as a samurai.
As Shinobu runs carrying Momonosuke, she sees that he had picked up a frog Mary, where he announces to his allies that Luffy wanted him to tell them that Luffy is still alive and that he would make it back, so no matter how hurt everyone is or if they have nothing left, they have to keep fighting, as it turns out the voice he previously heard was Luffy unconsciously telling him that he will defeat Kaido.
Momonosuke's words reinvigorate his allies as Kaido finally corners him and Shinobu. Shinobu uses her Devil Fruit powers to rot the rocks and causes the two of them to fall, much to his displeasure. As for Luffy, he is found by the Heart Pirates who proceed to save him. Tama cries in happiness that Luffy is alive and she, Usopp, and Nami run to the main stage, but Nami hears a voice coming from her Sorcery Clima Tact, looking down to see what appears to be Zeus' face.
Big Mom says that Momonosuke was bluffing and the war ended the minute he fell into the sea, but Law arrives on the scene and says that since he has been working with him for so long, he has now learned to never give up faith with him. Kid asks Law if he is getting in his way, and Law tells Kid that they should play nice for now and work together.
Yamato finally catches up to Kaido and addresses him by name, causing him to tell them to call him "father". Yamato, however, declares that they have come to free themselves from this so-called "parental bond".
- News of Luffy's defeat has begun to affect the morale of the alliance.
- Sanji's group arrives at the Live Stage.
- Kin'emon survived Kaido's attack, but is heavily wounded.
- Kaido pierces Kin'emon with a sword.
- Momonosuke confirms that Luffy is still alive, having sensed him earlier, and uses the frog Mary to broadcast this news across Onigashima, restoring the alliance's morale.
- Luffy is found by the Heart Pirates in their submarine.
- The Heart Pirates note that Luffy was able to communicate with them from underwater somehow.
- Nami's Clima-Tact is shown to have slightly transformed and now has a face similar to Zeus' that can talk.
- Law joins Kid in the latter's fight against Big Mom.
- While Kaido is outside, Yamato calls out to him from the roof.
- The title of the chapter uses the kanji 縁, which can mean "bond" or "relationship" between two people. However, the furigana gives the non-standard reading くさり (kusari), which is derived from the Japanese word for "chain". Thus, the title refers to the relationship between Kaido and Yamato, which Yamato likens to "chains".