Li Mu, a terminally ill patient, suddenly gets a dirt-poor shop System and transmigrates to the Marvel Universe. System, we're just a level-one weakling. Who gave you the nerve to pick this world?!
Fortunately, Tony Stark is still a playboy and hasn't become Iron Man yet. The curtain on this era has not risen, so he still has time to plan. Thus, Captain America is dug out ahead of schedule. After Iron Man's armor is broken, he steps out of it and personally beats the enemy to a pulp. Loki finally gives up fighting hand to hand and becomes a mage. Spider-Man spends all day shooting webs to make money.