Ichigo Kurosaki vs. Sode no Shirayuki is a fight between Substitute Shinigami Ichigo Kurosaki and manifested Zanpakutō spirit Sode no Shirayuki which takes place in Karakura Town at the beginning of the Zanpakutō Rebellion.
After the Zanpakutō of the Gotei 13 manifest in their spirit forms and begin to rebel against their former masters, Rukia Kuchiki and Renji Abarai get caught up in the commotion as some of the high-ranking Shinigami are defeated by their Zanpakutō, including Sajin Komamura and Byakuya Kuchiki. Before either Renji or Rukia can check on the status of Byakuya, they are ambushed by Rukia's Zanpakutō, Sode no Shirayuki, who attacks the two friends with Tsugi no mai, Hakuren.
Losing Renji in the scuffle, Rukia escapes to the Human World by using a Senkaimon. When she arrives in Karakura Town, Ichigo, sensing her, arrives just in time to catch her as she falls toward the ground. As an injured Rukia tries to tell Ichigo not to worry, he states she should look at the state she is in before telling him to do something like that. As another Senkaimon opens, Ichigo carries Rukia away from it using Shunpo just as Sode no Shirayuki steps into Karakura Town.
Forced to move away with Rukia as Sode no Shirayuki begins to freeze the ground directly in front of them, Ichigo, noticing her Reiatsu is not like a Hollow's Reiatsu and she does not have a Hollow mask, surmises she is not a Hollow. When she politely asks him if he is the Shinigami of Karakura Town, he demands to know who she is. When she sends an ice barrage towards him, Ichigo repels it with a Getsuga Tenshō, creating an explosion which Sode no Shirayuki jumps away from and up onto the nearby bridge.
When the Zanpakutō spirit declares Rukia belongs to her, a confused Ichigo states though he does not know her intentions, he wants to take care of Rukia himself. Understanding he will not give his friend up without a fight, Sode no Shirayuki charges at him, forcing him to get out of the way. When she asks if he is a Substitute Shinigami, Ichigo demands to know who she is, but she responds by using Some no mai, Tsukishiro on the baffled Ichigo, once again forcing him to avoid the attack.
As Ichigo recognizes the attack, Sode no Shirayuki follows up her attack with Tsugi no mai, Hakuren, forcing Ichigo to fire another Getsuga Tenshō to block this attack. During the resulting explosion, Ichigo, getting in front of Sode no Shirayuki, slices her with his Zanpakutō. As his target is revealed to be an ice clone, Sode no Shirayuki, unharmed by his attack, appears several feet in front of him. When Ichigo asks to know who she is and why she is using Rukia's techniques, Sode no Shirayuki, correcting him, lets him know they are actually her techniques. Sode no Shirayuki blows ice and snow in Ichigo's direction, distracting him long enough for her to escape back to Soul Society using a Senkaimon.
Rushing to Rukia's side, Ichigo learns their attacker was none other than her own Zanpakutō, which explains why she was able to use Rukia's techniques. Taking her back to Urahara's Shop, Ichigo he summons his friends, including Orihime Inoue, who heals Rukia's injuries. When she recovers, she explains what happened to her in the Seireitei, and how her own Zanpakutō attacking her had come about. Later, Yoruichi, arriving, reassures everybody the Gotei 13 are not as defeated as it seems, and they are preparing to counter the attack.