This cache is for Sarah Manning, lead character of the show! The cache takes you to the diner where Sarah stops by, in the first scene of season 2, after she finds out Kira and Mrs. S. are missing. After being offered a hot drink by the owner of the diner, she first meets Mark in a rather violent exchange that leads to the owner's demise.
I highly recommend visiting the diner to get the full experience. The cache is hidden outside with the authorization of the staff. It's a micro, unfortunately not a themed container because it's a little hard in high muggle area.
Happy Orphan Black caching!