I'm from australia and this show's promos have started. can someone please tell me what its about? it looks really good!

The 显示 chronicles the lives of the Family of Lord Crawley the Lord of the Manor at Downton Abbey and the machinations of his house staff, from 1912 about the time of the sinking of the 泰坦尼克号 and the first season concludes at the outbreak of WW1.