sting in the tail

Something surprising and unpleasant that concludes a chain of events.

Japanese Meaning

一連の出来事の締めくくりに現れる、予期せぬ不快な結果 / 事の結末に訪れる、思いもよらない厄介な状況

The deal sounded perfect, but there was a sting in the tail: hidden fees that wiped out his savings.

取引は完璧に思えたが、最後に落とし穴があり、隠れた手数料で貯金がすっかり無くなってしまった。

Sense（1）

Something surprising and unpleasant that concludes a chain of events.

stings in the tail

（ plural ）

stings in tails

（ plural ）