Rust and Metro live life to the fullest in the small Finnish city of Kotka. The lovers work together by day and write graffiti by night, always staying one step ahead of the law. But their luck runs out after an ambush by rogue security guards causes Rust to fall to his death. Having literally left their marks all over the city, Metro cannot help but be reminded of Rust everywhere she goes, making it impossible for her to move past the tragedy. Heartbroken and alone, she becomes determined to get to the bottom of her partner's death and to exact revenge on those responsible by using the tool she knows best: spray paint. As she fights to bomb the system, she is constantly--and harshly--reminded of how unfair life can be. Up against lies, betrayal, and corruption, Metro musters the strength and inspiration to persevere in the name of truth and by adding beauty to an ugly world.