Stones for Anna Krechetova are both her passion and her career. She has a blog about mineral properties. The owner of ‘Sapphire’, the company where Anna works as an expert, is not happy with that fact. It becomes unbearable to continue working at ‘Sapphire’, all because of the boss’s nit-picking. Anna writes her resignation letter. But a unique heart-shaped diamond disappears from the office’s safe on her last day of work. The “thief” goes online and makes a condition: Anna and Fyodor need to go to a forest and wait for further instructions. If they manage to do several weird tasks, the “thief” will give the diamond back. The dangerous challenges bring Anna and Fyodor closer. But when she finds out that Fyodor stole the diamond himself, Anna realizes she has been shamelessly tricked. Will Anna believe that Fyodor’s actions were dictated by his secret and passionate love to her?