Last month the Championnat National side, who are fighting relegation, defied all odds by setting up a historic domestic cup final against one of the world's wealthiest clubs.
Banked rolled by Qatar Sports Investments, the club's CEO Nasser al-Khelaifi claimed after acquiring the club in 2011 that PSG would be worth €1bn (R15.92b) as a global sporting brand.
And massive investment in squad personnel since then has the Ligue 1 champions well on their way to achieving that goal, with their more recent signing Neymar, for a world-record €222m (R3.3b), a testament to the relentless ambition.
Since the takeover, Les Parisiens have dominated the domestic scene with five league titles, three Coupe de France medals and five Coupe de Ligue triumphs.
The opposition standing in PSG's way for their fourth Coupe de France since 2011 has, in stark contrast, have never been higher than the French third-tier and hold an annual budget of €2m (R29m), which effectively covers Neymar's wages for a grand total of 16 days.
In what promises to be an ultimate David versus Goliath encounter at the iconic Stade de France, the pride of the tiny Les Herbiers City with a population of 15 933 have sold approximately 15 000 tickets, according to a report on BBC Football.
Along their way to the final, Stéphane Masala's side upset Ligue 2 outfits RC Lens and Auxerre, as well as fellow third-tier side FC Chambly in the semi-final.
Now, as they prepare to face top-flight heavyweights in the form of the Ligue 1 champions, the burning question is: can they can pull off one of the biggest upset's in world football tonight?