The Cup of Herostratus

In the times of the Titans, a powerful artifact was created — a cup that turns any drink into an elixir of immortality. Over the centuries, it has changed owners many times, but the ancient rulers of the Earth have... not lost hope of reclaiming it. The Titans are convinced that human weaknesses and strong emotions, such as hatred, will help them in this.
This feeling completely consumed Polina Korolkova: the former colleague of Alexandra shattered her life. One day, the girl finds a flyer in her mailbox inviting her to a session with a coach who works with such strong emotions. As therapy, the coach suggests that she devise a plan for the perfect murder of Alexandra. Strangely enough, this helps Polina; she really starts to feel much better. However, this does not last long; three days later, the girl learns that Alexandra has been murdered, and exactly as Polina had planned, with all evidence pointing to Polina…