The terrible troll-bird

One summer’s eve Ola, Lina, Sina, and Trina leave their village to gather firewood in the forest, when they’re surprised by the hideous call of the terrible troll-bird, a giant rooster who pops up out of the treetops and swoops down to devour their beloved horse Blakken. Little does the terrible troll-bird know that in Ola, Lina, Sina, and Trina he has finally met his match: his terrible days of terrorizing are over.