Although Nate the Great and his dog, Sludge, are on vacation, they just can't resist a new case. When his friend Claude's grocery list is lost, Nate sets out to find it before lunch. But lunch draws nearer and the list is still missing.
Nate the Great is worried: his reputation is at stake. It looks as if list has vanished--unless Rosamond's strange cat pancakes are somehow at the heart of the mystery.
雖然大偵探奈特和他的小狗阿泥正在度假，但他們還是接了新的案子。奈特要在午餐前找回他朋友克勞德弄丟的購物清單。然而，午餐時間就快到了，弄丟的清單依然下落不明。
奈特擔心他大偵探的名號不保，因為清單似乎已經不見了——除非羅莎蒙奇怪的貓咪鬆餅可能是整起事件的關鍵。