Glomgold sells a useless island to Scrooge, but upon learning that the island is rich in diamonds, he gets it back by trickery. Scrooge decides to travel back in time to prevent this from happening, but ends up in the distant past.
Scrooge hires accountant Fenton Crackshell to keep track of his fortune. When Fenton hears Scrooge wants his assets kept 'liquid,' he ends up dumping the entire fortune in Lake Dobegone, where the Beagle Boys soon find it.
Gyro creates a wearable suit dubbed "Gizmoduck," which accidentally finds it's way into Fenton Crackshell's hands. However, Fenton soon uses the suit to become Duckburg's newest hero, much to the chagrin of the Beagle Boys.
Scrooge gets amnesia and ends up working at one of his own factories in terrible conditions. Eventually, this makes him realize the error of his ways, and become a more generous employer - well, at least a little bit.
When trying to steal the prize money for a Rock and Roll contest, the Beagle Boys sing a song titled 'The Boogie Beagle Blues,' and end up impressing the crowd and winning the prize money! They soon become a music sensation.