Ed Miliband says the economic situation facing the country is so grave that Britain must pull together as a nation in a similar way as it did in the years after the Second World War.
That message will be delivered to an audience of voters in Manchester at the start of the Labour conference during which Mr Miliband must improve his own personal poll ratings to match those of his party.
Labour consistently enjoys a double digit lead over the Conservatives but Ed Miliband often comes behind the Prime Minister when voters are asked which man they prefer to lead the country.
The Labour Party will try to show this week that is can be trusted on the economy and that it can also deliver growth in a fairer way than the coalition.
The theme of the conference is "Rebuilding Britain."
The Labour leader has started the conference with a 75-minute long Q & A session at a Manchester school where delivered his grave warning about the bleak economic prospects.
He said that Britain must show, "the same spirit, the same determination, the same sense of national mission that there was as our parents and grandparents rebuilt Britain after the Second World War."
Mr Miliband's aides are stressing that he wants to reach out to voters during this week's conference rather than talk to the party and other politicians.
In a bid to show that Labour cares about those struggling to pay bills and make ends meet, the party is also promising to scrap the energy regulator Ofgem and replace it will an organisation that will better protect consumers.
The party says the new energy regulator will have legal powers to force the energy companies to pass on price cuts.
There are further announcements too on private pensions. Mr Miliband says the party will clamp down on those schemes with excessive charges that penalise the members in it.
The Conservatives also released the results of their private polling which found that two thirds of Labour supporters think Ed Miliband's brother, David, would make a better leader.
The research by Populus also found that 8 out of 10 voters don't regard Mr Miliband as "prime ministerial", compared with just 20% who do.
The Conservatives may be far behind in the polls but the party continues to pin its hopes for the 2015 election on Ed Miliband still being the leader of the Labour Party.
Over the next six days, Ed Miliband will try to show the country that he is a Prime Minister in waiting.