It's a Derren Brown effect - you explain how you got into magic, performing a rose production for a childhood sweetheart which completely fails with petals falling everywhere. Having explained that, a card is chosen and lost. The deck then vanishes, leaving behind one card - but not the chosen card. The magician then plucks a stream of cards from the air, but none of them are the chosen card, until he finally thinks he has it right. The card is revealed to be the chosen card - and then is transformed into a bunch of rose petals, in a moment of nostalgia.
Lovely construction, I love the plot, the premise, the impact, and the structure of the routine, even the sleights are just beautiful.