Elizabeth Baker wrote her first full-length play, Chains, at 32, and after it premiered in London in 1909, critics hailed a “new playwright of unmistakable dramatic genius.” But despite many plays that followed, success in London did not come again for Baker. And so Chains fits into the Mint Theater Company’s mission to “find and produce worthwhile plays from the past that have been lost or forgotten.” That mission is fulfilled in remarkable fashion in director Jenn Thompson’s lucid, moving, and exquisitely acted production, which feels both grounded in a specific historical and cultural milieu and yet also relevant today.