The 2017 British and Irish Lions tour has been years in the planning. But its success or failure will come down to the 80 minutes played at Westpac Stadium in Wellington tonight.
Talk of economic benefits and tills ringing may bring smiles to many, but it is the play on the field which ultimately counts.
Lose tonight and the Lions will have lost the series and the tour - for them anyway - will be seen as a failure.
There is a final test in Auckland next Saturday night but if the All Blacks get home tonight they will chalk up an unassailable 2-0 lead in the series and the test next week will quickly become irrelevant.
The Lions know this is the game of the season - many of them have said it is the biggest of their careers - and it is all on the line tonight.
So there is a lot at stake - a fact not lost on players or management of both teams.
The key for both teams, though, is going to be composure - the ability to make the right decision at the right time.
The Lions have brought in Johnny Sexton to play first five-eighth and so it is predictable what sort of style of rugby the men from the north are going to play.
They will kick the ball into the corners and look to squeeze the home side into mistakes.
But to do that is not easy. First it has to win the ball and get on top up front over an All Black engine room which won the battle with relative ease last week.
The Lions will look to be more combative in the breakdown and commit more bodies in the contest for the ball at the ruck.
All Blacks skipper Kieran Read is fully expectant that the Lions will throw everything and more at his team.
"This is going to be a big game, [of] that there is no doubt. They are going to hit us with everything. But we, too, know what we have to bring to such a big game," he said.
Read was mindful to not get too carried away with the occasion and he knows the Lions will be better.
The All Blacks caught the tourists on the hop last week with their direct play off halfback Aaron Smith and are unlikely to get such an advantage tonight.
Loose forwards Jerome Kaino and Sam Cane had a field day last week, making easy metres, but are bound to have less licence tonight.
Same with the guys out the back.
Sonny Bill Williams looks primed for a big match, but will be blanketed by defenders, while winger Waisake Naholo will be looking to continue his form he showed for the Highlanders two and a-half weeks ago.
The Lions should take some heart from the fact French referee Jerome Garces is going to be in charge.
He is familiar to them, but is also not exactly an unknown factor for the All Blacks. He has officiated the All Blacks before and they have prospered under his whistle.But the biggest factor is going to be what comes from above.
The Cake Tin, as it is called, attracts the wet weather and if the heavens do open - which is expected - then it will come down to a game of chess.
The Lions will not complain about the weather - the wetter the better for them.
But in that sort of stage it comes down to who makes the fewer mistakes.
Mistakes come from pressure and composure. Whoever can handle the former and maintain the latter should come out on top.