Go through a time portal and end up with Sherlock Holmes
They go on an adventure with Sherlock as he shows them what makes him happy but they realize that his happiness is not what makes them happy.
They all travel to the happiest person ... Barbie!
They think that they should go to somebody who can grant them wishes ... Genie!!
Go on an adventure with Barbie and realize that all the pink and plastic is not their form of happiness!
The group realizes that even though the Genie has granted them material wishes, it doesn't make them happy in the long term. They are now lost, and don't know how to answer the question ... "What is true happiness?"
But then they realize that going on this adventure together proved to be one of the happiest days of their life, and that together, they can make each other happy!