After Einur discovered the mysterious "tadpoles" by the canal, he met an old woman and learned that these "tadpoles" were related to an ancient curse. An evil wizard once attempted to control Amsterdam and was sealed by the guardian, but the "tadpoles" remained in the world and might cause a disaster. Einur decided to find the descendants of the guardian to properly deal with them. On the way, he met Lucas, a teenager who snatched the "tadpoles" to save his family...