Create a musical masterpiece that captures a somber and haunting atmosphere with a sense of urgency and restlessness. Let the music convey a feeling of melancholy and unease combined with an underlying tension that steadily builds up throughout the composition. Utilize minor chords and dissonant harmonies to evoke emotions of sorrow, while incorporating rhythmic elements that keep the listener engaged and on edge. Your task is to compose a piece that resonates with deep emotions and leaves a lasting impact on the audience.