Jake is determined to win the third grade science fair not only for the grand prize, but to beat the annoying class know-it-alls, as well.

While Papa is off fighting on the Missouri border, Charlie is left in charge of the family in their remote cabin in Bleeding Kansas and so must keep everyone safe when a fierce prairie blizzard growls and rages outside their door.

Fletcher the basset hound and his flea pal Jasper investigate the mystery of "who's got the bunny?"

To protect her gypsy friends, Heart and her unicorns leave them to continue their search for the place shown in Lord Dunraven's book whose symbols match those on Heart's foundling blanket.

Heart must hide her beloved unicorn, Moonsilver, from Lord Dunraven's hunters. She and her animal friends join a troupe of traveling minstrels. Everyone thinks Moonsilver's horn is fake--just part of the act. Then Moonsilver heals a badly injured boy and the unicorn's secret is in danger. Can Heart's mysterious silver bracelet help her find the one place Moonsilver might be safe?

Over his mother's objections Robert Henry Hendershot has joined the Union Army as a drummer boy. He wants to see battle and capture a Confederate soldier, but his company commander says he's too young and removes him from the pontoon carrying troops across the Rappahannock to face the rebels at Fredericksburg. Can Robert find a way to become a hero?