Babysitting little Leah Walquist might not be very exciting, but after one time travel escapade with her friends, Amy Yellow horse is happy not to go on any more adventures!
But when a girl shows up at the Walquists’ house with technology that can only be from the future, Amy realizes her day isn’t going to be normal after all. Thank goodness her friend Will Taylor comes along when he does. But even together, will Amy and Will be able to figure out how to help their new friend get back to her own time? And what should they do when the girl’s mischievous puppy plunges them all (including little Leah!) into another harrowing journey through time?