Marnie is on a class trip to visit a "stately home," and uses her new powers to defeat a bully, but the shoebox animals become separated from her and find themselves trapped in the basement.

Marnie hopes to find the archway shown on the clue she just received, and plans to do so while on a camping trip to the Eildon Hills with the help of Dougie and Laura, but things go awry when Toledo interferes.

The shoebox animals plead with Marnie to continue the quest, but she insists on trying to catch up on her schoolwork after largely neglecting it. Despite her efforts, she gets falsely accused of cheating during a test, leading to further drama with the school principal.

The stay at Camp Healing Bow continues. Marnie’s odd behavior seems to worsen, which puts a strain on her friendship with Kyle. Despite this, the two agree to investigate the next clue, an eagle rune, together. Meanwhile, Marnie’s father arrives in Denver to visit her, but things take an unexpected turn when Aurora picks him up at the airport.

It’s the last day of camp, and Marnie’s father comes to visit her. However, happiness quickly turns to anger when Marnie sees that he’s brought Aurora along with him, and that they’ve seemingly fallen in love with one another.