Heiko's mother Belinda suffers from keratoconus, a rare change in the cornea. She is gradually losing her sight and could soon go completely blind if she is not helped. Belinda's sight could be regained with the cornea of a deceased donor - but a transplant costs a lot of money, which is not covered by health insurance. For Heiko, this marks the beginning of an odyssey through Berlin's pub scene: in order to raise the money for his mother's operation, he takes on the best darts players in the city, at first reluctantly, but then with growing ambition, euro for euro. However, they have completely different plans and drag Heiko into a spiral of madness that he could never have imagined.