Με τον πατέρα του εκτός δράσης, ο Μαρκ αγωνίζεται να υπερασπιστεί την πόλη ενάντια σε μια πολυδιάστατη εισβολή, ενώνοντας δυνάμεις με μια ομάδα εφήβων υπερηρώων.

Feeling lost and confused, Mark looks for advice from Eve. At the same time, everyone's looking for him.

In the aftermath of his father's betrayal, Mark struggles with his responsibilities as Invincible and encounters an unexpected enemy.

As Mark attempts to salvage his personal life, a new villain arrives, presenting Invincible with his greatest challenge yet. Donald grapples with his past.