Soaring to the edge of Earth's stratosphere, a 1912 scientific expedition traveling aboard a uniquely designed dirigible sets out for advanced observations of the moon and stars. Yet lies, hidden agendas and personal conflicts threaten the mission. Amidst all this, an unexpected love affair draws two passengers together. Daschle's heart has been shattered by one who did not return his love for her. Irina could be his salvation as their journey takes them to the edge of Heaven and back.