When concert pianist Lissa Campbell learns that she has a serious heart problem. she vows to enjoy what time she has left. On taking her first holiday, she meets Kit Firth, a pilot on leave, because his future vision may disappear due to a bomb explosion while he was in active service. Kit Firth is searching for a rare mineral Britian needs in the war effort. When there is an explosion at the local tin mine, Kit and several others are trapped, but due to his knowledge of the mine workings, he find out more...