What makes life perfect? Insurance mathematician Henri Koskinen knows the answer because he calculates everything down to the very last decimal. And then, for the first time, Henri is faced with the incalculable. After suddenly losing his job, Henri inherits an adventure park from his brother - its peculiar employees and troubling financial problems included. The worst of the financial issues appear to originate from big loans taken from criminal quarters ... and some dangerous men are very keen to get their money back. But what Henri really can't compute is love. In the adventure park, Henri crosses paths with Laura, an artist with a chequered past, and a joie de vivre and erratic lifestyle that bewilders him. As the criminals go to extreme lengths to collect their debts and as Henri's relationship with Laura deepens, he finds himself faced with situations and emotions that simply cannot be pinned down on his spreadsheets ...

Insurance mathematician Henri Koskinen has finally restored order both to his life and you YouMeFun, the adventure park he now owns, when a man from the past appears - and turns everything upside down again. More problems arise when the park's equipment supplier is taken over by a shady trio with confusing demands. Why won't Toy of Finland Ltd sell the new Moose Chute to Henri when he nees it as the park's main attraction? Meanwhile, Henri's relationship with artist Laura has reached breaking point, and, in order to survive this new chaotic world, he must push every calculation to its limits, before it's too late...