Daniel is an extra-class killer

Daniel is a top-notch killer, a master of disguise and psychological manipulation. His motto: "The victim must take the final step themselves. "He doesn't shoot; he encourages "accidents." He's tasked with eliminating a journalist (heroine's name). She investigates the mysterious deaths of reporters, delving into the affairs of a powerful mafia. The client demands: "Her disappearance must look like a suicide or an accident. No trace left." Daniel begins surveillance. (Heroine's name) lives in an apartment with panoramic windows, writes by candlelight, and listens to jazz. She doesn't hide; she publishes excerpts from her investigations on her blog.
Danielle arranges a "chance" meeting in a café, posing as an editor. In the conversation: (Name) speaks of the importance of "giving voice to those who have been silenced" ; Danielle discusses "the fine line between truth and destruction. "
He notices: her eyes are unusually attentive.
Gradually, Daniel begins to grow attached to her, thereby falling in love with his victim: he plants anonymous tips for investigations; intercepts orders from competitors to prevent her from being killed prematurely; eagerly awaits the release of her new publications.
(Heroine's name) feels invisible support and writes on her blog: "Is there a guardian angel or a provocateur devil? I don't know. But he leads me to the truth."