Louise's baby is sick! The distraught John invites Colonel Doyle, his two nieces and an experienced nurse to go to visit the baby in California. When everyone is immersed in the joy of reunion, incredible things happen: the baby, the maid Inez and the nurse disappear! They have turned the town over but cannot find them. They try their best to search and are surprised to find that the missing seem to be in the old house all the time. However, they can hear them but cannot see them. What's more, some other people disappear before everyone...