The main cast includes Silmu Ståhlberg, Lumi Kallio, Eelis Kesäläinen, Ylermi Rajamaa, Pamela Tola, Jenni Kokander, and Timo Lavikainen.
The story follows Ricky (Ståhlberg), his friend Nelly (Kallio), his aunt Rauha (Tola), and neighbor Mr. Lindberg (Rajamaa) as they vacation at a cabin resort.
There, they meet father-and-son Bill (Lavikainen) and Sylvester Pöntinen (Kesäläinen), who are preparing for a strength competition.
When Rauha and Nelly develop an interest in fitness, Ricky and Mr. Lindberg become jealous.
Determined to prove their strength, they enlist Ricky’s Aunt Elvi to train them for an arm-wrestling match.