After being transported to another world, Lin Yu becomes an employee of the IRS (Internal Revenue Service). On his first day, the IRS director gives a speech: In America, the IRS is the biggest! Only death and taxes are eternal! From the White House, FBI, and CIA down to criminals, everyone has to pay taxes! So begins Lin Yu's hilarious journey of collecting taxes from superheroes and villains alike, including Nick Fury, Tony Stark, Ethan Hunt, Thor, and even Batman!