As computer hacker Lisbeth and journalist Mikael investigate a sex-trafficking ring, Lisbeth is accused of three murders, causing her to go on the run while Mikael works to clear her name.

Ove, a grumpy, isolated retiree who spends his days enforcing block association rules and visiting his wife's grave, decides to give up on life until an unlikely friendship develops with a boisterous young family that moves in next door.