One night, there was a sudden storm blowing over the Everfree Forest, which resulted in several of the ducks living at Fluttershy's cottage to misplace their ducklings: using the word 'lost' would imply they'd never get found again. And as brave as Fluttershy was (which is to say generally never), there was still a limit to her tracking skills. As it turned out though, she happened to see an advert in Equestria Daily yesterday for an animal rescuer from the Minotaur Lands, and decides that she's got nothing to lose apart from a service fee for trying.
As it turns out, the rescuer was a rather old but surprisingly buff guy, who looked as though he'd picked a fight with about seven hydras all at once and lost. Despite the fact that he only had one good eye and was apparently deaf in the left ear, assured Fluttershy that he can track and retrieve all sixty-three ducklings that went missing. With the job clarified, the rescuer went on to discuss the matter of payment.
Unfortunately, all of Fluttershy's spare bits was allocated to looking after the rest of her animal critters, and so she was left with no choice but to pay in collateral. As it happened, she had a gold chain necklace made up of (by a frankly contrived coincidence) sixty-three links. She decided to part with that, but owing to the disproportionate value of the chain, Fluttershy refused to pay up front. The animal rescuer, however, suspicious of Princess Celestia's foreign policy and of ponies in general, wouldn't take a payment afterwards in the event of Fluttershy reneging on the deal.
Fortunately, as any good friend can tell you, a compromise solves everything. They agree that Fluttershy will pay the rescuer one link for every successful rescue, protecting both from foul play. Unfortunately, it IS a rather pretty necklace and the minotaur doesn't want it ruined beyond repair, so he demands Fluttershy make no more than three breaks in the chain.
Completely stymied, Fluttershy now needs you to sort out this problem. And maybe learn some sort of lesson in friendship if it turns out there is one.