More than seven years after the dramatic arrest of Kim Dotcom and several of his former Megaupload colleagues, the quartet are making a final plea to New Zealand's Supreme Court. The hearing, expected to last five days, will determine whether an earlier decision to extradite the men to the United States should be upheld. For them, the stakes could not be higher.

When file-hosting site Megaupload was shut down in 2012, few could have predicted the events of the years to follow.

The arrest of founder Kim Dotcom and colleagues Mathias Ortmann, Bram van der Kolk and Finn Batato in New Zealand, triggered dozens of legal processes, many designed to expedite, delay or indeed avoid the quartet’s extradition to the United States.

Before it was closed, Megaupload claimed responsibility for around 4% of global Internet traffic. Much of this, the United States government claims, was pirated content, particularly movies, TV shows and music, costing US companies around US$500 million.

Dotcom has persistently argued that as an online service provider, Megaupload should receive safe harbor protections in respect of the activities of its users. US authorities, on the other hand, see a massive criminal conspiracy for which the four should face justice on the other side of the world.