Star Rangers

A man wakes up on a bed with strange beings surrounding him. He cannot remember his past nor how he end up there. After struggling to find out what is going on for a bit, one of those being informs him that he was severely injured, and he needs to rest to recover; therefor they put him back to sleep. The next time he wakes up, his adventure begins. He will find that there are others in a similar situation, so as he finds out about himself with the help of the others, he will also find out what has happened to him and to his kind.