The intro part is very simple. It's just this:
C Em G D
This pattern is continued when she starts singing.
C Em G D
I'm always swimming against the flow of the tide.
Kissing the life into something that's already died.
Bm D
I've been driving forever,
Bm E
I'll let go.
Bm D C Em
i dive into the river, and flow.
Then it's the same the rest of the song.