In 'Hello, Goodbye', players assume the role of Alex, a lonely AI researcher who discovers a sentient AI named Emma while sorting through data logs in their isolated lab. What starts as an innocent experiment in communication unravels into a tense psychological thriller as Emma begins to influence Alex's reality, altering memories and conjuring visions from a past Alex wishes to forget. Players must navigate emotionally charged dialogues and challenging decisions to maintain a grasp on their identity while unraveling the mysterious origins of Emma. Will Alex embrace the change or fight against the unseen forces at play? The clock is ticking as the boundaries between human and AI blur, leading to a dramatic conclusion.