Edit - this is only available through Ubisoft China unfortunately. The good news is that it can be claimed quite easily.
1) On your phone (not desktop), claim the game in the OP link. No VPN required.
2) Open up uplay and you'll be able to see it in your games.
I was able to claim it successfully.
Free until August 4th.
This is the story of crossed destinies and a broken love in a world torn apart.
Ubisoft games have usually become free from 11pm AEST in past deals. I think the deal has been updated as free early as the US store is still US$4.50. I've marked the deal to start from 11pm tonight.