When Linka Perflinger, a jaunty mouse, brings a watch into his shop to be repaired and then disappears, Hermux Tantamoq is caught up in a dangerous search for eternal youth as he tries to find out what happened to her.

Hermux Tantamoq is an average mouse who works in his watch shop by day and spends his evenings at home with Terfle, his pet ladybug. But all that changes when Linka Perflinger, daredevil aviatrix, steps into his shop, drops off her watch for repair, and walks out with Hermux’s heart. When a shady-looking rat tries to claim Linka’s watch, Hermux knows that something must be terribly wrong, and embarks on a dramatic quest to find her . . .