When Tommi doesn't get the promotion he was hoping for from his father-in-law Johan, he decides to get into the investment business to buy his dream house with his wife, Harriet. However, things are complicated by the fact that Tommi is easily fooled and the money from the old apartment, more than half a million euros, disappears in a pyramid scheme. When Tommi is in danger of losing Harriet for good, his loyal friend Juhis takes the reins. Juhis plans a rescue operation that kind of works.
Julius, who devours comic books and vampire stories, has a lively imagination. Julius meets Arnold Cautious, who lives in an abandoned house on the outskirts of town and introduces himself as a degenerated, strawberry juice-drinking vampire. Julius and Cautious become friends. Together they try to make the Lucky Stone, the recipe for which is in Cautious' grandmother's secret recipe book. Julius wants to give the stone to his estranged parents so they can rediscover their common happiness. Julius and Arnold's laboratory attempts to make the Lucky Stone falter badly time and time again, but they stubbornly pursue their quest for happiness.
An architect about to begin her maternity leave starts to suspect that her replacement is trying to take over her grand design, and her life.
In the middle of the summer holidays, the body of a drowned man with ligature marks on his wrists is recovered from Tammerkoski river. The investigation by Koskinen's team is further strained by the hit-and-run case of a dubious music manager and the mysterious Carl Friedrich. When a new body is found in Lake Näsijärvi, the connection between the victims is made clear.
In the middle of the summer holidays, the body of a drowned man with ligature marks on his wrists is recovered from Tammerkoski river. The investigation by Koskinen's team is further strained by the hit-and-run case of a dubious music manager and the mysterious Carl Friedrich. When a new body is found in Lake Näsijärvi, the connection between the victims is made clear.