Today, Alex is going to help her friend Atticus spot a real tiger in the wild. Atticus has never seen a tiger before, but Alex knows everything about tigers. She's even made her own field guide about them, which she uses to explain to Atticus what to look for: stripes, big teeth, nocturnal! But each new fact only leads Atticus to a different (and wrong) animal! When he hopefully asks, “Is this a tiger?” he's disappointed to discover that, though it meets the criteria, it's not! Will these two intrepid explorers ever manage to find a tiger?