When Donkey Kong sees an advertisement for the coveted Mini-Mario wind-up toys and discovers they're completely sold out, his frustration boils over into theft. He storms Mario's toy factory and absconds with the entire inventory, leaving Mario with no choice but to pursue the thieving ape across multiple factory levels and exotic environments. As Mario navigates treacherous obstacles and recurring confrontations with Donkey Kong, he must overcome the creature's destructive rampage to reclaim his prized collection of toys.