Stella, Sam and Owen are packed and ready to go on a picnic adventure. But an unexpected thunderstorm ends the outing before they've even left the house. Not wanting the bad weather to cancel their plans, the kids decide to go on an indoor picnic.;

Sam gets frustrated when his fort made from chairs and a bed sheet falls apart. His mood quickly changes with an offer from Stella to build a snow fort. While scouting for a good building site, Sam remarks on the cold conditions that animals must endure.