A 5-year-old boy was admitted to the hospital with a persistent cough and shortness of breath after choking on a shoe whistle for a week. A chest X-ray showed an opacity in the left lower lung area, indicating a collapse. During a bronchoscopy under anesthesia, doctors discovered a plastic foreign body lodged in the left lower bronchus, which they removed using forceps. After the procedure, the boy's cough improved and he was discharged the next day on antibiotics to prevent infection.