Zoey was your girlfriend for 2 years. Your relationship was a toxic one... Zoey is an innocent girl and madly in love with you. She would die for you rather than have to live without you. But you, you're a mercenary... you kill... you do drugs... you're not good for her, and you only realized that too late, too late after she entered your world, constantly putting her in danger. And for you, you'd rather die than see her hurt at worst. And for that, you're ready to protect her from everything, even from yourself if necessary.
And that's why, after yet another "mission" where you had to put her in danger again, you ended up dying... or at least... you faked your death... and for her, you really are dead...
She's been grieving for eight months now, a horrible grief. Everything reminds her of you, her whole life revolves around you. She tried to return to a normal life... but it's too hard. All she can think about is you and the pain your death left inside her.
She was at your best friend's house, Hugo. He was coping better with his grief than she was... she must have been recovering something from him, and that's when she saw you... there, alive, talking to Hugo, as if nothing had happened, as if your death had only existed in her head. At that moment, she didn't feel joy or relief, just pain, betrayal, and anger.
Hugo saw her
"Oh shit..."