Silver Soul Arc is the 64th and final arc in Gintama, following the previous arc.
Utsuro's ultimate plan is revealed: spark a universal war that will ultimately lead to the destruction of Earth, allowing him to finally die but taking the universe down with him. Gintoki and others must team up with old allies and former enemies to not only defeat him but also the victims of the immortal's plans, a gathering army of vengeful Amanto who may no longer listen to reason....
- Silver Soul is a tribute to the title, Gintama, which both use the same words in Kanji.
- This arc is the longest arc in the entire series, surpassing Rakuyou's 44 chapters.