This is the second book in the series of The Adventures of Jack and Milo. Jack and Milo are at the airport playing with Gizmo, the pup that they rescued at the airport. Jack finds Milo and Gizmo playing with Gizmo's new best friend, Zach. Jack remembers when he meets a little girl named Gracie and how Milo came to live with him and become his best friend. New characters are introduced and special pages of coloring books and puzzles are included at the end of the story.