Scrooge's plans to merge McDuck Enterprises with Vanderbucks Industries soon includes a proposal of marriage when he falls for CEO Millionaira Vanderbucks.
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 tries to return to the present, after being stranded in prehistoric times. On the way he discovers stowaways - a cave duck named Bubba and his pet triceratops Tutsi.
After returning to the present, Scrooge get his hands on the diamond mine, stolen from him by Glomgold in the previous episodes. Meanwhile, Bubba tries to get used to living in the modern world.