The Hashirama Cell was extracted from the body of the First Hokage Senju Hashirama, and depending on how it is handled, its power to stimulate life energy to explosive proportions makes it extremely dangerous. Boruto and the others learn that the cell is in the hands of a wealthy individual who lives in Fushuu Castle, and plan on retrieving it. But there are others who are after it as well.
Don't forget that we're right
in the middle of the lion's den.
.لا تنس أنّنا وسط عرين الأسد
Vergiss nicht, dass wir uns hier
im Lager des Feindes befinden.
No olvides que estamos
en territorio enemigo.
No olvides que estamos
en territorio enemigo.
Non dimenticare che siamo 
nel cuore del territorio nemico.
Não se esqueça que
estamos no covil do leão.
Помни, что мы с тобой в змеином логове.