"The Radiant Shell" by Paul Ernst is a science fiction novella that was published in January 1932. The story revolves around the theft of a powerful weapon's plans that could threaten the security of the United States. The narrative follows Thorn Winter, a scientist who develops a method of invisibility, which he intends to employ for a dangerous mission to retrieve the stolen plans before they fall into the wrong hands. In this gripping tale, the Secretary of War learns that Arvania, a seemingly insignificant nation, has acquired the Ziegler plans for a devastating heat ray. Fearing imminent war, he enlists the help of Thorn Winter, who uses his revolutionary invisibility technique to infiltrate the Arvanian Embassy. As Winter maneuvers through the embassy, he faces mounting dangers, including armed guards and the alertness of a dog. The tension escalates, leading to a chaotic confrontation as Winter fights to escape, clutching the vital plans amidst the chaos. Ultimately, his cleverness allows him to return the plans, thwarting Arvania's sinister intentions while leaving readers on the edge of their seats. (This is an automatically generated summary.)