Hello TheGamer,
Welcome to the jam.
If you are not a story person, then just come up with a simple scenario. Maybe you are trapped somewhere and have to find seven keys for an exotic door? Each of the keys is acquired by solving a different puzzle tree? The great thing about treasure hunts is that (although it can have a good story) it doesn't have to have a great narrative.
Good luck with making progress, and if you get stuck for inspiration, check the design thread out in this community. Garry just wrote a post on design.
Be seeing you,
Chris