Prince Namor the Sub-Mariner #1

Namor returns to Atlantis to find that Warlord Krang has taken his throne. When he spurns the affections of Lady Dorma, she turns him in and he is arrested by Krang as a traitor. Realizing that the only thing that will allow him to regain his kingdom and his subjects is the Trident of Neptune, Namor escapes to go and recover it.