Andre Forcier Lea is crushed when she hears that her boyfriend Reo has run off with another woman on the eve of her 18th birthday. To round out Lea's misery, her overweight sister Manon is sexually obsessed with the famous author Chester Celine. When the author does actually appear in the middle of this mess and just as quickly starts running from the amorous Manon, he runs straight into the arms of Lea and into an incredible love affair. Crushed, Manon takes refuge in a convent where her abstinence leads her to inner peace.
Love is a miracle.
In the end, Lizette and Reo hit the road to happiness, Marcel drowns in his desolation and Lea, madly in love, runs off to Wyoming with Chester. Love is a Knockout.