"One-Shot" by James Blish is a science fiction short story published in the mid-20th century. The narrative revolves around a critical incident involving a mysterious egg-like object released by a Polish freighter in New York harbor, leading to a high-stakes investigation by the CIA. The story explores themes of intuition, risk, and the interplay between data-driven decisions and human instinct. In the plot, the protagonist, Dr. Peter Harris, is tasked with managing the unfolding crisis as various intelligence officials scramble to determine the true nature of the object before a looming deadline. Integral to this investigation is Abner Longmans ("One-Shot") Braun, a veteran gambler with a unique ability to read the odds in high-pressure situations. As time ticks down, Braun's insights become pivotal for making a crucial gamble that may endanger millions. Ultimately, the story examines the balance of logic against instinct in decision-making when lives are on the line, culminating in an unexpected twist that reinforces Braun's critical role in the operation. (This is an automatically generated summary.)