Hey, welcome back. :D
The tail end of the Christmas/winter event is still going on. If you go to the ice tunnels, you can get the first part of the story. I believe we're waiting on the next part, unless someone else has figured out what we're supposed to do. :) Hopefully when it ends, the ice tunnels will open. There's also a name clearing thing going on at the moment.
I put a lot of time an energy into collecting creatu, completing the item collections, and boosting one of my pets nourishment list.