The plot or conspiracy has been exposed or discovered.
比喻阴谋已败露。
元·孔文卿《东窗事犯》第二折吾乃地藏神，化为呆行者，在灵隐寺中，泄漏秦太师东窗事犯。”明·田汝成《西湖游览志馀·佞倖盘荒》可烦传语夫人，东窗事发矣。”
The bribery scheme finally came to light when the accountant confessed, proving that the east window affair had happened.
Learn the next connected idiom: 东窗事发 (dōng chuāng shì fā) → 发扬光大 (fā yáng guāng dà)
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