The title is taken from a Scottish song by Robert Burns, the complete line being "Ae Fond Kiss, and then we sever..." The film explores the complications which ensue when second-generation Scottish Pakistani Casim (who is Muslim) and Roisin (a Catholic immigrant from Ireland) fall in love.

The only son, Casim, is also a qualified accountant, but earns his living as a DJ and hopes to open his own nightclub with his friend Hammid.

Roisin, who previously worked part-time as a music teacher at the Catholic school, is offered a full-time position.

Roisin, in a good mood, unexpectedly offers Casim a stay of several days in Spain.

The days in Spain are harmonious and full of love, but Casim admits to Roisin that according to his parents' wishes, he must marry his cousin.

Casim puts forward his feelings for Roisin and decides to cancel the planned wedding, even if it endangers the peace of the family.

Casim confides in his friend Hammid, who advises him against starting a relationship with Roisin because it would destroy his family.

Shortly before the start of the school year, Roisin wishes to obtain a certificate from the parish priest.

The priest refuses because he has learned that Roisin lives with a Muslim and has sexual relations with him outside of marriage.

Roisin is angry at the priest's narrow-mindedness, but gets the full-time position without explanation, because the warden considers her love affair a private matter.

Casim is outraged that his parents never informed Jasmine's family of his decision and now want to force them to marry.