Frog is not feeling well. He keeps getting hot, then cold, and something inside his chest is going 'thump-thump' really fast. Hare says he must be in love but who is he in love with?
Pig is hosting a sleepover for Frog, Duck and Hare. Everyone wants to stay up late - but after playing games, listening to Pig sing, having a pillow fight, and Hare's reading, everyone is a sleepy-head but Frog.
When a rat comes to live at the edge of their wood, Duck and Pig decide they don't like having a stranger in their midst. But Frog is friendly by nature and decides to find out if Rat is really as unpleasant as he's made out to be.
One day Frog finds a little bear lost and alone in the forest. He decides to take him home to be his new friend. They do everything together and they're best friends.
On a snowy, cold winter day Frog wishes he had someone to play with. Duck, Pig and Hare are all ice skating but Frog doesn't like to skate and he feels like the only one of his friends who doesn't like the cold weather.
Frog is miserable, and he cannot see why. Nobody has upset him, and nothing has gone wrong particularly, but he still feels blue. His friends try to cheer him up but they all end up crying.
It's a hot summer day - too hot to do anything but be hot. Frog, Duck and Pig keep cool by swimming in the river. They try and convince Hare to join them in the nice cool water, but Hare refuses.
All excited, Frog decides he and Little Bear are going to dig for treasure. But how can he be sure that there will be some? And how deep will he and Little Bear have to dig to find it?
One morning, Frog wakes up and yawns -- but nothing comes out. Frog has lost his voice. He runs to the river to tell Duck but Duck thinks that Frog is playing a game and pretends she can't talk either.
Frog and Duck don't believe in ghosts until they hear frightening noises in the dead of night. They run over to Pig's house where they all cuddle together.
Frog feels like the overcast sky: gray and dull. He never felt like this before. He can't think of anything to do, he's just not interested in anything today - he just doesn't feel like himself.
After it has been raining for three days, Frog decides to go check on his friends. Pig's and Duck's houses are flooded, but Hare's is on a little island.
It's a tradition that every year Pig decorates her yard with beautiful lights and cooks a delicious feast for all her friends. But this year Pig has fallen from a ladder and hurt her arm.
Frog and Duck run into Fox. He's hungry and has an appetite for Duck. After pursuing her for some time, Duck is getting very scared so they have to come up with a plan.
