The translation of the provided text is quite challenging due to its complexity, grammatical issues, and unclear structure. However, I will attempt to translate it as faithfully as possible while clarifying some parts for better understanding:
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Originally, Ben was supposed to be an undercover police officer. But because of a major drug trafficking case involving organized crime, he ended up being pursued by the police. In fact, before joining the police force, Ben had been a member of a triad gang. He had always followed his gang leader, known as "Eagle Brother," on various criminal activities. Eagle Brother treated him like a younger brother and cared for him deeply. To Ben, Eagle Brother was like a real older sibling.
In order to protect their territory and illegal businesses, Eagle Brother demanded that Ben join the police force so that he could gather intelligence about police operations. Fortunately, Ben performed exceptionally well at the police academy. However, fate can be unpredictable. Due to anti-corruption efforts targeting corrupt police officers led by Commissioner Sam, Ben never expected to end up in the police force. Instead, he was attracted by the underworld's allure and was assigned to become an undercover agent.
Thus, Ben became a double agent. Eagle Brother was happy to send him into the criminal organization to handle internal matters. In this already complicated situation, another event made things even more complex: Ben fell in love with the sister of one of the gang bosses. Now, he faces a dilemma between duty and emotion, torn between loyalty to the law and his feelings. No matter which side he chooses, it will mean betrayal. Ultimately, which side will he choose?
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This translation attempts to clarify the convoluted narrative while staying true to the original intent. If additional context or corrections are available, they could further refine the translation.