The book opens to Sasha refusing Tigerstar's offer to join ShadowClan. Shocked, Tigerstar tells her that the two of them would be feared, to which she replies that she would rather be loved. Their conversation turns into an argument, and Sasha insists that Tigerstar's plans go against the Warrior Code. When she sticks with her decision to not join ShadowClan, Tigerstar tells her that she will now always be nothing, and walks off into the forest. Back at her den, Sasha thinks about her heartbreak, and dreams of Ken coming, finding her, and taking her home. She makes her way out of the forest, realizing that she has no place there anymore. She bumps into Pine, and tells him that she is leaving. He acts very disappointed, but wishes her luck. Sasha returns to where she used to live with Ken and Jean, and is chased away by the Twolegs that is now living there. She explores all over Twolegplace, looking for Ken in stores and on the street. In a secondhand clothing store, Sasha catches Ken's scent and finds one of his coats. She begins to realize that something is very wrong with Ken. As she roams Twolegplace, Sasha meets up with two BloodClan warriors, and narrowly escapes. Wandering and wandering, she makes her way onto a tour boat, where she curls up and goes to sleep. When Sasha wakes up, the floor is shaking. She runs outside to jump off, only to find that the boat is surrounded by water. She is spotted by the tourists, who believe her to be a ship cat, and the captain shuts her in a cupboard. Let off the boat, she notices that the captain looks lonely and sad. When she sneaks back onto the boat, she begins to attract many customers to the boat service as "Brownie the Famous Ship's Cat." One night, she even prevents two saboteurs from burning the boat. Because she brings happiness to the captain, she keeps staying longer, even though she wants to go. One day when the boat is out, Sasha finds a bag with a very young cat inside it in the water. The captain takes him home and names him Patch, paying more attention to him than to Sasha. The spring thaw arrives, and the captain ties up the boat prepares to go elsewhere. Sasha decides not to go with the captain and Patch because she now knows that she is going to have kits, and wants them born in the forest. Patch is sad, but he understands. Snow starts to fall as Sasha walks away, symbolizing the start of leaf-bare.