Don Diego, who uses the alias Salvador Gilarranz, is arrested but escapes before Rosalinda's coach reaches the fortress. Zorro rides on and finds Victoria's youngest brother Ramon lurking around, together they climb in. Inside the alcalde and Victoria plead in vain for her father, so she goes to liberate the prisoners herself, overpowering Rosalinda, is helped by Mendoza, Zorro deals with the troops. Meanwhile the alcalde has his own secret agenda, which turns out crucial for the grandfather in the present too...

Once the Three Musketeers are assembled, Diego helps them form a plan to regain their ancestors' castle. Later, Zorro helps them execute the plan and establish themselves as the protectors of their town.