Ignore the low scores, this is a good film.
It's dated and seems a bit wobbly here and there, but the script and acting are excellent.
I understand why they used Martin Sheen, not because he is a fine actor, it was to get financing and possibly attract a US audience.
The movie shows that even honest people can be lured by the 'Big Payday', and commit crime. This is what the movies premise revolves around, and does it well. Martin Sheen, an architect, finds himself in a situation, where financially he is stretched by his families lavish lifestyle. He's approached to help a band of crooks pull off a heist in a banks security box room. Initially he is duped into thinking he is employed to help extend an office building, but discovers it's a ruse.
He confronts the leader of the crooks and reveals he has worked out the ruse, then is told of the real reason they approached him. He refuses to help, at first, but after his bank threatens to foreclose on his mortgage, and he realises his kids would have to leave their private schools, he agrees to help.
What follows is a classic mix of heist, greed, desperation and redemption.
I hope you watch this movie and make your own mind up.
It could do with being redone with modern techniques, script and a bigger budget.