Sociedad looked sharp and threatening in the first half, putting pressure on PSG.
However, the tide turned once the Parisians grabbed the lead. Mbappe, ignited by his goal in the 58th minute sparked a flurry of attacks, leaving Sociedad struggling to keep up.
It seemed that was not enough, Barcola doubled the goal in the 71st minutes making PSG cruise to victory.
Despite their valiant efforts, La Real faces a daunting task in the return leg if they want to overturn this deficit.