The wolf pack returns in Hangover 4, with Phil (Bradley Cooper), Stu (Ed Helms), Alan (Zach Galifianakis) and Doug (Justin Bartha) finding themselves in an even wilder situation than before. The film begins with the group reuniting for a seemingly harmless bachelor party for Stu’s cousin in Tokyo. Despite her promises to take it easy, Alan insists on planning the evening, which unsurprisingly leads to chaos.After a night without light, the group wakes up in a high-tech penthouse with no memory of the previous evening. Doug goes missing – again – and they discover a cryptic note asking them to retrieve a stolen microchip that Alan accidentally took from a seedy underground casino. As they spend the night together, this ventures Packs of wolves roam the neon-lit streets of Tokyo, from sumo wrestling arenas to karaoke bars, trying to solve the mystery.