Library Fish, who calls the library her home, decides it is time to learn to do what everyone around her loves doing--read.

Paired together after a veteran detective retires, Platypus Police Squad members Rick Zengo, a hotshot rookie, and Corey O'Malley, a hard-nosed old-timer, struggle with their differences while tackling their first case involving a missing schoolteacher and a duffle bag filled with illegal fish.

"Este pez pequeñito tiene un sombrero que no le pertenece. ¡Se lo robó a un pez grande! El sombrero es azul y muy bonito, le queda muy bien. Y además, el pez grande no vio cómo lo robaba. Y seguramente, aunque lo hubiera visto, no se imagina dónde se va a esconder. Nunca lo encontrará. ¿O sí?"-- A tiny minnow wearing a pale blue bowler hat has a thing or two up his fins in this underwater light-on-dark chase scene.