A Detective Story (2003) on Netflix

Ash, a private detective, is quite frankly sick of his job. It's not as adventurous as he thought it was and on top of that both his fridge and bank account are empty. When the phone rings, Ash promises to his cat Dinah he will quit the business forever if this is yet another husband who wants his wife shadowed. But the caller is quite a different gentleman. He wants Ash to look for a computer hacker called Trinity. The caller refuses to say his name, but Ash is quickly persuaded to take on the job when he sees his recently updated bank account balance. When he starts investigating, Ash finds something strange. He is not the first detective looking for the hacker.