Nick Abrahams still holds the official world record for the number of space launches, but he's bored stiff with his job hosting space tours. Only when his wife leaves him, however, does he try to change his life.
He accepts a tempting offer from a Russian billionaire. In exchange for making a simple repair on Neptune's moon Triton, he will return to Earth a multi-millionaire, enabling him to achieve his 'impossible dream' of buying his own California vineyard.
The fact that Nick must travel alone during the four-year roundtrip doesn't bother him at all, as he doesn't particularly like people anyway. Once en route he learns his new boss left out some critical details in his job description—details that could cost him his life, and humankind its existence...