Here’s a summary of the plot:
The tank is a grim, brutal place — fish are routinely taken out to be killed for customers. Padak trains and bides her time. The climax involves a daring leap from the tank during a moment of chaos.
Padak, however, refuses to surrender. She tells Spotty and the others about the vast, free ocean. She devises a plan to escape. The older fish think she’s crazy, but Spotty is inspired.