<article> <figure> <img src="http://www.moviesom.com/resources/20150216211140social.jpg" title='An Invisible Sign' alt='An Invisible Sign'/> </figure> <h1>An Invisible Sign</h1> <p>Mona Gray is a 20-year-old loner who, as a child, turned to math for salvation after her father became ill. As an adult, Mona now teaches the subject and must help her students through their own crises.</p> <details><summary>Runtime: 96</summary> <summary>Release date: 2010-10-06</summary></details> </article>