The lead actor is korean actor chi jun hee, who also starred in the popular series “jewel in the palace”.
alyssa is obviously the lead female.
The story will revolve around weddings (duh) and the love relationship b/w the 4 leads, alyssa, chi jun hee, nie yuan and penny.
There’s heaps more info on this series in nie yuan’s thread, and there’s also a thread for the series at tvss and hksf. those two forums has heaps of info on the series and many pics as well.