A ragtag crew of mice decides to storm a tyrant's territory with nothing but guts and loyalty. The 1975 animation doesn't just look good, it moves with a fluidity that makes every chase, every confrontation, every moment of small creatures against impossible odds feel genuinely alive. Gamba doesn't ask you to care about mice with speeches; it shows you a kid discovering that standing against cruelty costs everything, and then watching him choose to do it anyway. The white ferret Noroi is a villain you understand without needing to hear his backstory. Few adventure shows from that era have aged this clean, or hit this hard when a tiny mouse decides he's had enough.

Gamba is an adventurous wild mouse who sets out with his friends to see the ocean. Along the way he comes across an injured mouse and hears about the violence of Noroi, a white ferret who has taken over an island and terrorizes the mice living there. Moved by their suffering, Gamba decides to help the mice oppressed by Noroi's tyranny. What starts as a trip to the sea becomes a daring adventure, as a small group of mice sets out to stand against a far more dangerous foe.