Synopsis

Igawa Masaki is an ordinary happily married man who lives in a peaceful town working as a caregiver at a nursing home.
Then one day, Igawa is involved in a fall accident and loses consciousness. A week later, he finally wakes up and rushes home – but is shocked to discover that a complete stranger is living there while pretending to be him. Even more disturbingly, his coworkers, neighbors, and even his wife Mayumi seem unable to remember who he is.
 
Torn from his peaceful life, Igawa finds himself trapped in an inexplicable situation. Torn from his happy everyday life and pushed to the edge by an inexplicable situation, Igawa is left with one desperate question: what on earth has happened to him? As the mystery unfolds, a shocking truth lurking beneath the surface gradually comes to light.