"What would you do if your adventuring party was joined by… your grandma?!"
Ulric von Whitelake is the third son of a noble family, but he leads a life of adventure far from court. Joined by the healer Liu and the shieldmaiden Celine, the trio forms the party known as The Happy Tree. When wintertime proves too cold for traveling, the group decides to come to Whitelake and freeload at the mansion of Ulric’s grandma. However, they soon find out that Grandma Levina has been poisoned! Now she wants to go on one last adventure with the party. Will The Happy Tree agree to her request?