<Ul> <Li> Will Smith </Li> <Li> Alice Braga </Li> <Li> Dash Mihok </Li> </Ul> <Tr> <Th> Music by </Th> <Td> James Newton Howard </Td> </Tr> <Tr> <Th> Cinematography </Th> <Td> Andrew Lesnie </Td> </Tr> <Tr> <Th> Edited by </Th> <Td> Wayne Wahrman </Td> </Tr>

What is the plot of i am legend