Tanaka, AKA Dagger, never misses a chance to make money. When a rival member of a vigilante team comes to him to help rescue her father, he sees a chance to cash in and maybe bring a family together.

Daniel, AKA Shadow Ninja, feels his life as one of the city's protectors is coming to an end. With a fiancé and a thriving business, spending the night patrolling the streets with Tanaka doesn’t have the same appeal as it did before.

Both brothers feel their time together as a team is short. Will this be the last adventure of Dagger and Shadow Ninja? Will Dagger be able to finish his assignment without his brother? What deadly secrets will both of them uncover as Tanaka's mission spins wildly out of his control?

The Honor system is the third book to feature Dagger and Shadow Ninja, and the fourth in the Evolutionite series. It deals with the aftermath of the events from Infinity Rises and pushed forward the story of the Evolutionites and the city of Haven.