The Essence of Love set is featured in the (American) Occasions mini catalog. In the SCS gallery, you can find it under the "Recent Mini" category.
It's my understanding that it will be added to the main SU listings once this mini catty has expired.
No one has posted an index stamp for the set, but it's made up of 4 stamps: the big floral image, a solid butterfly image, the phrase "thinking of you", and a quote by Robert Louis Stevenson: "The Essence of Love is Kindness."
I hope that helps!
Edited to add, I see that Sandee was typing at the same time I was!