To hate like this is to be happy forever

Great movie and really hilarious. You won't regret watching this movie. One of the best comedy films of the year.

here's the plot courtesy of wikipedia

Following the events of Harold & Kumar Go to White Castle, Harold Lee and Kumar Patel fly to Amsterdam so Harold can pursue a budding romance with his neighbor, Maria. After a prolonged struggle with security, the pair run into Vanessa, Kumar's ex-girlfriend, who happened to be the one who introduced Kumar to marijuana and helped him come out of his shell as an undergraduate. They are soon joined by Vanessa's fiancee, Colton, who helped Harold get his current job before embarking on a career with the government. The two pairs separate, but not before Vanessa and Kumar share a moment. The two board the plane, but a passenger becomes instantly nervous at Kumar's appearance, envisioning him as a terrorist. Mid-flight, Kumar follows Harold to the restroom with his new invention: a smokeless bong. As Harold exits, someone sees Kumar lighting the bong. Kumar says, "It's okay, it's just a bong," and another passenger yells, "[It's] a bomb!"

Air marshals immediately detain both men, and the plane returns to Washington, where Ron Fox, an overzealous undersecretary of Homeland Security, interrogates the pair before sending them to Guantanamo Bay detention camp. Moments after their arrival, the pair are instructed to perform an oral sex act (a "cock meat sandwich") on a guard, but amidst commotion in the next cell in which two terrorists escape, they quickly take advantage of their own unlocked cell to escape the prison complex,[3] hitching a ride to Miami aboard a boat used by Cuban immigrants.

In Miami, they borrow a car from their college friend Raza who is having a "bottomless" pool party. Then, as fugitives from Homeland Security, they travel from Miami to Texas in search of Colton, in hopes that he will be able to help them through his father, who is connected with several high political officials. Kumar agrees to the plan, secretly hoping to disrupt the marriage.

Their trip becomes disrupted in Birmingham, Alabama, the pair abandon their vehicle when a group of black men playing basketball approach them after they wreck their vehicle into a fire hydrant (who were in reality trying to help them fix their vehicle and to see if they were okay). Lost in the forests of Alabama, the pair wander upon a redneck out deer hunting who invites them back to his shack to meet his beautiful wife and their inbred cyclops son. Afterwards, they accidentally stumble upon a Ku Klux Klan meeting, and avoid being lynched by jumping into a car driven by Neil Patrick Harris. High on mushrooms and Jack Daniel's, Harris transports the pair to the Texas border, where he uses his fame to get through a road block set up by the DHS. However, rather than proceed directly to the wedding, Harris insists that the trio stop at his favorite whore house. Kumar appears to take advantage of the situation, much to Harold's chagrin. Harold confesses to the other prostitutes that Kumar is selfish and thinks only of himself and not of the consequences that affect others. Kumar, meanwhile, is confessing to the pair of prostitutes in the room that he doesn't know why he broke up with Vanessa, and is still in love with her. However, the pair is forced to flee the whorehouse after Harris is chased out, then gunned down for branding his initials on the leg of a prostitute. During the car ride to Colton's, while searching for Neil's family contacts, Harold pulls out a mask similar to the one worn by Chris Fehn of Slipknot.

Harold and Kumar arrive at Colton's house the day before the wedding. Harold goes to tell Colton of their situation, instructing Kumar to remain in the car or their friendship is over. However, Kumar sees Vanessa, who is outside in search of a joint she hid outside, fall and twist her ankle, prompting him to leave the car. Kumar treats her ankle and the pair nearly kiss until their are interrupted by Colton and a fuming Harold, who sees that Kumar left the car. Vanessa is taken inside and Colton takes the pair to the airport, where he promises that he has taken care of everything. However, Harold and Kumar discover that they are instead going to be taken back into custody by Fox. Colton reveals that he never had any intention of helping either of them, prompting Harold to promise revenge.

On the plane, Harold remains angry at Kumar, who apologizes for getting them into their predicament and promises to change. Harold draws a can of mace from his pocket on the pretense of giving marijuana to the agents that are accompanying them, and the pair overpower their captors. However, they are sucked outside of the airplane when the door is accidentally opened. Harold, the only one wearing the parachute, is able to get a hold of Kumar, who is in free fall. Harold deploys the parachute and as they dodge gunfire from Fox, who jumped out after the pair without a parachute, who presumably falls to his death. They land in President George W. Bush's[3][6][4] Texas home in Crawford, Texas, where the President is hiding to avoid attending the aforementioned wedding. After bonding over marijuana, the President pardons the pair and sends the Secret Service to help them. Harold and Kumar object to the wedding, revealing Colton's true nature. Enraged, Colton attacks Harold, who promptly levels him with a knee to the stomach and a punch in the face. Vanessa is angry at Kumar for embarrassing her at the wedding, but forgives him when he recites the poem that he had been writing on the day they met, but was too embarrassed to share with her until now. The three leave the wedding, heading to Amsterdam, where Harold finds Maria, who appears to be with another man but is actually in the middle of a photoshoot. Still, she finds the gesture romantic and no harm is done. The movie ends with everyone enjoying the city and its offerings.

After the credits, Neil Patrick Harris is shown waking up from his presumed demise, cursing his wounds.