When big-mouthed Prudence learns of Arc and Ciara's secrets, she agrees to have her memory wiped before accidentally exposing her friends to the entire kingdom, then forgets they were ever her friends at all. The crossover continues on Henry Danger S05E09 Knight & Danger (II)

Arc's secret is threatened when Sir Gareth confiscates Prudence's magic mirror containing a picture of him that will prove he is not a true Dragonblood.

When the Phoenix Squad suspects Sage is cheating, Ciara uses the Princess to recruit her as a guard and keep her from training for the upcoming whip battle.

Prudence’s quirky ideas while running for Class Ruler has her friends in the Phoenix Squad worried that she will embarrass herself, so they secretly take over the campaign.

The squads fight against each other in one final battle, with the top group becoming Knights of Astoria forever!