The 25-year-old is one of the French top flight's most in-demand properties following an incredible season that saw him plunder 21 goals in all competitions for 'Les Aiglons'.
Plea came through the ranks at Lyon before making the move to Nice in August 2014.
His performances at the Allianz Riviera have attracted significant interest from overseas and in particular the Premier League, with West Ham, Newcastle, Fulham and Tottenham all thought to be among the clubs monitoring the player.
However, Nice are not believed to be looking to sell their star man though, and are expected to hold out for a fee in the €30m (£26.6m).
Plea is thought to be very open to a move should a club agree a deal with his current employers.