Paris Saint-Germain beats Barcelona at Nou camp for the first time in the history, meanwhile Mbape's Hat-trick is the 3rd to be score against Barcelona in a champions league match.
The match was open in the first half; both Barcelona's Antoine Griezmann and Mauro Icardi for Paris SG missed a good chance to score before the 20th minute.
Lionel Messi broke the deadlock, scored from the penalty spot when Layvin Kurzawa brought down Frenkie de Jong in the 26th minute.
In the 32nd minute, Kylian Mbape received a through ball from Marco Verratti and sends it powerfully in the top left corner bringing the match to draw level before half time.
After the break, Mauricio Pochettino's side took over and Mbape increases the score line in the 67th minute, 3 minutes after Moise kean who is on loan from Everton made it 1-3, perfectly meeting a free kick from Leandro Paredes with a header from the edge of the six yard box.
In the 85th minute Kylian Mbape completes his hattrick, collected a brilliant pass from Julian Draxler and buries the ball from close range into the back of the net.
The return leg will be played on March 10, leaving Barcelona a slim chance of a comeback win at Parc des Princes in France.